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github-actions[bot] edited this page Jan 26, 2026 · 3 revisions

Two-Factor Authentication (OTP)

Tested ✓ 2026-01-26

Time-based One-Time Password (TOTP) authentication for passwordless login via OTP codes.

Overview

Daptin supports TOTP-based two-factor authentication as a standalone login method. Users can authenticate using a 4-digit OTP code sent to their mobile number or email, without requiring a password.

Important: This is NOT traditional 2FA added on top of password auth - it's a separate passwordless login flow using OTP codes.

Quick Start (5 Minutes)

1. Enable OTP for User

TOKEN=$(cat /tmp/daptin-token.txt)

# Create OTP profile for user
curl -X POST http://localhost:6336/action/user_otp_account/send_otp \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "attributes": {
      "email": "user@example.com",
      "mobile_number": "1234567890"
    }
  }'

Response: [] (OTP profile created, no code returned)

2. Generate Current OTP (For Testing)

Since SMS delivery isn't configured by default, use this script to generate the current OTP:

generate_otp.go (Click to expand) 
package main

import (
	"crypto/aes"
	"crypto/cipher"
	"database/sql"
	"encoding/base64"
	"fmt"
	"log"
	"time"

	_ "github.com/mattn/go-sqlite3"
	"github.com/pquerna/otp"
	"github.com/pquerna/otp/totp"
)

func main() {
	db, err := sql.Open("sqlite3", "./daptin.db")
	if err != nil {
		log.Fatal(err)
	}
	defer db.Close()

	var encryptionSecret string
	err = db.QueryRow("SELECT value FROM _config WHERE name='encryption.secret'").Scan(&encryptionSecret)
	if err != nil {
		log.Fatal("Failed to get encryption secret:", err)
	}

	var encryptedSecret string
	var email string
	err = db.QueryRow(`
		SELECT uo.otp_secret, ua.email
		FROM user_otp_account uo
		JOIN user_account ua ON uo.otp_of_account = ua.id
		LIMIT 1
	`).Scan(&encryptedSecret, &email)
	if err != nil {
		log.Fatal("Failed to get OTP secret:", err)
	}

	otpSecret, err := decrypt([]byte(encryptionSecret), encryptedSecret)
	if err != nil {
		log.Fatal("Failed to decrypt:", err)
	}

	code, err := totp.GenerateCodeCustom(otpSecret, time.Now(), totp.ValidateOpts{
		Period:    300,
		Skew:      1,
		Digits:    4,
		Algorithm: otp.AlgorithmSHA1,
	})
	if err != nil {
		log.Fatal("Failed to generate OTP:", err)
	}

	fmt.Println("Email:", email)
	fmt.Println("Current OTP:", code)
	fmt.Println("Valid for:", 300-(int(time.Now().Unix())%300), "seconds")
}

func decrypt(key []byte, cryptoText string) (string, error) {
	ciphertext, _ := base64.URLEncoding.DecodeString(cryptoText)

	block, err := aes.NewCipher(key)
	if err != nil {
		return "", err
	}

	if len(ciphertext) < aes.BlockSize {
		return "", fmt.Errorf("ciphertext too short")
	}

	iv := ciphertext[:aes.BlockSize]
	ciphertext = ciphertext[aes.BlockSize:]

	stream := cipher.NewCFBDecrypter(block, iv)
	stream.XORKeyStream(ciphertext, ciphertext)

	return string(ciphertext), nil
}

Run it from Daptin directory:

go run generate_otp.go
# Output:
# Email: user@example.com
# Current OTP: 9152
# Valid for: 247 seconds

3. Login with OTP

curl -X POST http://localhost:6336/action/user_otp_account/verify_mobile_number \
  -H "Content-Type: application/json" \
  -d '{
    "attributes": {
      "email": "user@example.com",
      "otp": "9152"
    }
  }'

Response:

[
  {
    "ResponseType": "client.store.set",
    "Attributes": {
      "key": "token",
      "value": "eyJhbGciOiJIUzI1NiIs..."
    }
  }
]

Success! JWT token received, user is authenticated.

Core Concepts

How It Works

  1. OTP Profile Creation: send_otp creates a user_otp_account record with encrypted TOTP secret
  2. OTP Generation: 4-digit codes generated using TOTP (Time-based One-Time Password)
  3. Code Validity: Each code valid for 5 minutes
  4. Verification: verify_mobile_number validates code and issues JWT token
  5. Status Tracking: First successful verification marks account as verified=1

TOTP Parameters

Parameter Value
Algorithm SHA1
Digits 4
Period 300 seconds (5 minutes)
Skew ±1 period (allows 5 min before/after)
Issuer site.daptin.com
SecretSize 10 bytes

Why OTP Codes Aren't Returned

The send_otp action returns [] (empty response) because it's designed for SMS delivery. In production, you would configure an SMS provider to send codes to users. For development/testing, use the generate_otp.go script to generate codes manually.

Complete Examples

Example 1: Enable OTP for New User

TOKEN=$(cat /tmp/daptin-token.txt)

# Step 1: Create OTP profile
curl -X POST http://localhost:6336/action/user_otp_account/send_otp \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "attributes": {
      "email": "alice@example.com",
      "mobile_number": "+1-555-0123"
    }
  }'

# Response: []

# Step 2: Verify profile was created
curl http://localhost:6336/api/user_otp_account \
  -H "Authorization: Bearer $TOKEN" | jq '.data[] | select(.relationships.otp_of_account.data.id != null)'

Response:

{
  "type": "user_otp_account",
  "id": "019bf973-ab1c-7dbb-8e43-7b6715f2b562",
  "attributes": {
    "mobile_number": "+1-555-0123",
    "verified": 0,
    "created_at": "2026-01-26T14:07:45Z"
  }
}

Verification:

  • OTP secret created and encrypted
  • verified starts as 0 (unverified)
  • otp_secret excluded from API response

Example 2: Login with OTP (Email Lookup)

# Get current OTP code (using generate_otp.go)
go run generate_otp.go
# Output: Current OTP: 3721

# Verify OTP and authenticate
curl -X POST http://localhost:6336/action/user_otp_account/verify_mobile_number \
  -H "Content-Type: application/json" \
  -d '{
    "attributes": {
      "email": "alice@example.com",
      "otp": "3721"
    }
  }'

Response:

[
  {
    "ResponseType": "client.store.set",
    "Attributes": {
      "key": "token",
      "value": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJlbWFpbCI6ImFsaWNlQGV4YW1wbGUuY29tIiwiZXhwIjoxNzY5Njc2MDEyLCJpYXQiOjE3Njk0MTY4MTIsImlzcyI6ImRhcHRpbi0wMTliZjkiLCJqdGkiOiIwMTliZjk3NS1lOGI5LTdhNTAtYjEwNy01YTg5MTZkYjhhMGEiLCJuYW1lIjoiQWxpY2UiLCJuYmYiOjE3Njk0MTY4MTIsInN1YiI6IjAxOWJmOTczLTRjMjAtNzVmNy1iNWIxLWU5ZDI2YzM5OGVlZSJ9.xyz..."
      }
    }
  }
]

Decoded JWT:

{
  "email": "alice@example.com",
  "name": "Alice",
  "sub": "019bf973-4c20-75f7-b5b1-e9d26c398eee",
  "exp": 1769676012,
  "iat": 1769416812,
  "iss": "daptin-019bf9"
}

Database Changes:

  • user_otp_account.verified → 1
  • First verification marks account as verified

Example 3: Login with OTP (Mobile Lookup)

# Verify using mobile number instead of email
curl -X POST http://localhost:6336/action/user_otp_account/verify_mobile_number \
  -H "Content-Type: application/json" \
  -d '{
    "attributes": {
      "mobile": "+1-555-0123",
      "otp": "3721"
    }
  }'

Response: Same JWT token response as email lookup

Note: You can use either email OR mobile to identify the user during verification.

Example 4: OTP Without Mobile Number

# Enable OTP for email-only user
curl -X POST http://localhost:6336/action/user_otp_account/send_otp \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "attributes": {
      "email": "bob@example.com"
    }
  }'

# Works! mobile_number is optional

Use case: Email-based OTP delivery instead of SMS.

Actions Reference

send_otp

Purpose: Create or retrieve OTP profile for a user

OnType: user_otp_account InstanceOptional: true (no auth required) Method: POST

InFields:

{
  "email": "user@example.com",         // Required if mobile not provided
  "mobile_number": "+1-555-0123"      // Required if email not provided
}

Response: [] (empty array)

Side Effects:

  • Creates user_otp_account if doesn't exist
  • Generates new TOTP secret (encrypted)
  • If account exists, does nothing (no duplicate creation)

Behind the Scenes:

  • Calls internal otp.generate action via OutFields
  • Generates 4-digit OTP code (not returned to client)
  • Designed to trigger SMS delivery in production

Example:

curl -X POST http://localhost:6336/action/user_otp_account/send_otp \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"attributes":{"email":"user@example.com","mobile_number":"1234567890"}}'

verify_mobile_number

Purpose: Verify OTP code and authenticate user

OnType: user_otp_account InstanceOptional: true (guest access allowed) Method: POST

InFields:

{
  "otp": "9152",                      // Required: 4-digit code
  "email": "user@example.com",        // Either email OR mobile required
  "mobile": "+1-555-0123"            // Either email OR mobile required
}

Response:

[
  {
    "ResponseType": "client.store.set",
    "Attributes": {
      "key": "token",
      "value": "eyJhbGciOiJIUzI1..."
    }
  }
]

Validation:

  • Looks up user_otp_account by email or mobile
  • Decrypts TOTP secret
  • Validates OTP code (5-minute window, ±1 period skew)
  • Generates JWT token if valid

Side Effects:

  • Marks user_otp_account.verified = 1 on first successful verification
  • Issues JWT token (3-day expiry by default)

Errors:

{
  "ResponseType": "client.notify",
  "Attributes": {
    "message": "Invalid OTP",
    "title": "failed",
    "type": "error"
  }
}

Example:

curl -X POST http://localhost:6336/action/user_otp_account/verify_mobile_number \
  -H "Content-Type: application/json" \
  -d '{"attributes":{"email":"user@example.com","otp":"9152"}}'

Configuration

Encryption Secret

OTP secrets are encrypted using encryption.secret from the _config table:

SELECT value FROM _config WHERE name='encryption.secret';

Important: Keep this secret secure. If lost, all OTP secrets become unrecoverable.

JWT Configuration

JWT tokens issued by OTP verification use the same configuration as password-based signin:

SELECT * FROM _config WHERE name LIKE 'jwt.%';
Config Default Description
jwt.secret (auto-generated) HS256 signing key
jwt.token.life.hours 72 (3 days) Token expiry
jwt.token.issuer daptin-{id} Token issuer

Server Restart

Not required - OTP functionality works immediately after creating user_otp_account records.

Database Tables

user_otp_account

Column Type Description
reference_id string Primary key (UUID v7)
mobile_number varchar(20) User's phone number (optional)
otp_secret varchar(100) Encrypted TOTP secret (AES-CFB)
verified bool Verification status (0=unverified, 1=verified)
otp_of_account reference Foreign key to user_account
created_at timestamp Record creation time
updated_at timestamp Last update time

Relationships:

  • otp_of_account → user_account (belongs_to)

Indexes:

  • mobile_number (indexed for fast lookup)
  • otp_secret (indexed for authentication)

Example Query:

SELECT ua.email, uo.mobile_number, uo.verified
FROM user_otp_account uo
JOIN user_account ua ON uo.otp_of_account = ua.id;

Encryption Details

Algorithm

  • Cipher: AES-CFB (Cipher Feedback Mode)
  • Key: encryption.secret config value (32 bytes)
  • IV: Prepended to ciphertext (first 16 bytes)
  • Encoding: base64.URLEncoding

Encryption Process

// From server/resource/encryption_decryption.go
func Encrypt(key []byte, text string) (string, error) {
    plaintext := []byte(text)

    block, _ := aes.NewCipher(key)

    // IV prepended to ciphertext
    ciphertext := make([]byte, aes.BlockSize+len(plaintext))
    iv := ciphertext[:aes.BlockSize]
    io.ReadFull(rand.Reader, iv)

    stream := cipher.NewCFBEncrypter(block, iv)
    stream.XORKeyStream(ciphertext[aes.BlockSize:], plaintext)

    return base64.URLEncoding.EncodeToString(ciphertext), nil
}

Decryption Process

func Decrypt(key []byte, cryptoText string) (string, error) {
    ciphertext, _ := base64.URLEncoding.DecodeString(cryptoText)

    block, _ := aes.NewCipher(key)

    iv := ciphertext[:aes.BlockSize]
    ciphertext = ciphertext[aes.BlockSize:]

    stream := cipher.NewCFBDecrypter(block, iv)
    stream.XORKeyStream(ciphertext, ciphertext)

    return string(ciphertext), nil
}

Security Notes

  1. Secret Storage: Secrets encrypted at rest in database
  2. Key Management: encryption.secret stored in _config table
  3. IV Usage: Random IV for each encryption (prepended to ciphertext)
  4. No Key Rotation: Changing encryption.secret breaks existing OTP profiles

Production Setup

SMS Integration

To send OTP codes via SMS in production, you need to:

  1. Configure SMS Provider (e.g., Twilio, AWS SNS)
  2. Modify send_otp Action to trigger SMS delivery
  3. Environment Variables: 
    export SMS_PROVIDER=twilio
export TWILIO_ACCOUNT_SID=your_account_sid
export TWILIO_AUTH_TOKEN=your_auth_token
export TWILIO_FROM_NUMBER=+1234567890

Email Integration

Alternatively, send OTP codes via email:

  1. Configure SMTP (see wiki/Email-Actions.md)
  2. Modify send_otp to call mail.send action
  3. Email Template: 
    Subject: Your Login Code

Your OTP code is: {{otp}}

This code expires in 5 minutes.

Rate Limiting

Recommended: Limit OTP requests to prevent abuse

-- Example: Max 5 OTP requests per hour per user
-- Implement using action middleware or reverse proxy

Security Checklist

  • Enable HTTPS (required for production)
  • Configure SMS/email delivery for OTP codes
  • Implement rate limiting on send_otp action
  • Monitor for brute force attempts on verify_mobile_number
  • Rotate encryption.secret periodically (requires OTP re-enrollment)
  • Log authentication attempts for audit trail
  • Set up alerting for suspicious OTP activity

Troubleshooting

Issue: Empty Response from send_otp

Symptom:

curl -X POST .../send_otp ...
# Response: []

Cause: This is expected behavior. OTP codes are not returned to the client.

Solution:

  • For testing: Use generate_otp.go script to generate current code
  • For production: Configure SMS/email delivery to send code to user

Issue: "Invalid OTP" Error

Symptom:

{
  "ResponseType": "client.notify",
  "Attributes": {
    "message": "Invalid OTP"
  }
}

Possible Causes:

  1. Expired Code: OTP codes expire after 5 minutes
  2. Clock Skew: Server time out of sync (>5 minutes)
  3. Wrong Code: Typo in 4-digit code
  4. Already Used: OTP codes are single-use within validity period
  5. Wrong User: Email/mobile doesn't match OTP profile

Diagnostics:

# Check if OTP profile exists
sqlite3 daptin.db "SELECT * FROM user_otp_account WHERE mobile_number='1234567890';"

# Check server time
date -u

# Generate current OTP for verification
go run generate_otp.go

Solutions:

  • Regenerate OTP using send_otp action
  • Verify server clock is accurate (use NTP)
  • Check database for correct email/mobile mapping

Issue: Cannot Create OTP Profile

Symptom:

{
  "errors": [{
    "status": "403",
    "title": "Forbidden"
  }]
}

Cause: User account doesn't exist

Solution:

# Verify user exists
curl http://localhost:6336/api/user_account \
  -H "Authorization: Bearer $TOKEN" | jq '.data[] | select(.attributes.email == "user@example.com")'

# If not found, create user first via signup action

Issue: Multiple OTP Profiles for Same User

Symptom: send_otp creates new profile instead of reusing existing

Diagnosis:

SELECT COUNT(*) FROM user_otp_account WHERE otp_of_account = (
  SELECT id FROM user_account WHERE email='user@example.com'
);

Cause: This should NOT happen - send_otp reuses existing profiles

Solution: If this occurs, it's a bug. Check logs for errors:

./scripts/testing/test-runner.sh logs | grep -i "otp"

Issue: OTP Works Initially, Then Stops

Symptom: First OTP verification works, subsequent verifications fail

Cause: Database transaction rollback or verified flag not persisting

Diagnosis:

-- Check verified status
SELECT verified FROM user_otp_account WHERE mobile_number='1234567890';

Solution:

  • Check database file permissions
  • Verify database isn't locked by another process
  • Check logs for transaction errors

Issue: Decryption Fails

Symptom: generate_otp.go errors with "ciphertext too short" or decryption fails

Cause: encryption.secret changed or database corruption

Diagnosis:

-- Check encryption secret hasn't changed
SELECT value FROM _config WHERE name='encryption.secret';

-- Check OTP secret format
SELECT LENGTH(otp_secret) FROM user_otp_account;

Solution:

  1. If encryption.secret changed: All OTP profiles need re-enrollment
  2. Delete affected user_otp_account records
  3. Users must re-enroll via send_otp action

Issue: Clock Skew Errors

Symptom: OTP codes valid on one server but invalid on another

Cause: Server clocks out of sync

Diagnosis:

# Check server time
date -u

# Compare with NTP server
ntpdate -q pool.ntp.org

Solution:

# Synchronize server clock
sudo ntpdate pool.ntp.org

# Or use systemd-timesyncd
sudo timedatectl set-ntp true

Note: TOTP has ±1 period skew tolerance (±5 minutes), but significant clock drift causes issues.

Edge Cases

Edge Case 1: OTP Profile Without Mobile Number

Scenario: User has email but no mobile number

Behavior:

  • send_otp creates profile with mobile_number = ""
  • Verification works with email lookup only
  • Mobile-based verification fails

Example:

# Enable OTP (email only)
curl -X POST .../send_otp -d '{"attributes":{"email":"user@example.com"}}'

# Verify with email works
curl -X POST .../verify_mobile_number -d '{"attributes":{"email":"user@example.com","otp":"1234"}}'

# Verify with mobile fails (user has no mobile)
curl -X POST .../verify_mobile_number -d '{"attributes":{"mobile":"555-0123","otp":"1234"}}'
# Error: "unregistered mobile number"

Edge Case 2: Multiple Users Same Mobile Number

Scenario: Two users share a mobile number

Behavior:

  • Each user has separate user_otp_account with different secrets
  • Verification by mobile number finds first matching record
  • This is NOT recommended - mobile numbers should be unique

Example:

# User A: alice@example.com, mobile: 555-0123
# User B: bob@example.com, mobile: 555-0123

# Verify by mobile - which user?
curl -X POST .../verify_mobile_number -d '{"attributes":{"mobile":"555-0123","otp":"1234"}}'
# Returns token for whichever user's OTP profile was found first

Recommendation: Enforce unique mobile numbers at application level.

Edge Case 3: OTP Code Regeneration

Scenario: User requests new OTP before old one expires

Behavior:

  • send_otp does NOT change the secret
  • New OTP code generated from same secret
  • Old code and new code both valid (if within 5-minute window)

Example:

# T=0: Request OTP
curl -X POST .../send_otp ...
# Code: 9152 (valid until T+300)

# T=60: Request OTP again
curl -X POST .../send_otp ...
# Code: 9152 (same secret, same 5-min period)

# T=310: Request OTP again
curl -X POST .../send_otp ...
# Code: 3721 (new period, different code)

Note: Codes change every 5 minutes based on TOTP algorithm, not on request.

Edge Case 4: Verified Account Re-verification

Scenario: User verifies OTP, then tries to verify again

Behavior:

  • Subsequent verifications still work
  • verified flag stays 1 (already set)
  • New JWT token issued each time

Example:

# First verification
curl -X POST .../verify_mobile_number -d '{"attributes":{"email":"user@example.com","otp":"9152"}}'
# Response: JWT token, verified=1

# Second verification (same code, within 5-min window)
curl -X POST .../verify_mobile_number -d '{"attributes":{"email":"user@example.com","otp":"9152"}}'
# Response: New JWT token, verified still 1

Note: OTP codes are NOT consumed after use - they remain valid for their 5-minute period.

Edge Case 5: Boundary Timing

Scenario: User generates code at T=299 seconds (1 second before period boundary)

Behavior:

  • Code valid from T=0 to T=300
  • At T=300, new code generated
  • With skew=1, both codes valid from T=295 to T=305

Example:

T=0-300:   Code A (9152) valid
T=300-600: Code B (3721) valid
T=295-305: BOTH codes valid (skew overlap)

Implication: Users have 10-second window where two codes work simultaneously.

Known Limitations

  1. No OTP Code Return: send_otp doesn't return the OTP code to the client (designed for SMS/email delivery)
  2. No Disable Action: No built-in way to disable OTP for a user (must delete user_otp_account record)
  3. No Backup Codes: No fallback mechanism if user loses access to OTP
  4. No QR Code Generation: No built-in authenticator app support (e.g., Google Authenticator)
  5. No Re-enrollment Flow: If encryption.secret changes, all users must re-enroll
  6. Single OTP Profile: One user_otp_account per user (cannot have multiple devices)
  7. No Rate Limiting: Built-in rate limiting not implemented (add via middleware)
  8. Separate Login Flow: OTP login is completely separate from password login (not 2FA on top of password)

Comparison with Password-Based Signin

Feature OTP Login Password Login
Action verify_mobile_number signin
Credentials Email/Mobile + 4-digit OTP Email + Password
Validity 5 minutes Until changed
Storage Encrypted TOTP secret Bcrypt password hash
JWT Token Same format Same format
2FA Not supported Not supported
Passwordless Yes No

Use Cases:

  • OTP Login: Mobile apps, SMS-based auth, temporary access
  • Password Login: Web apps, long-term accounts, admin access

Testing Guide

Test Scenario 1: Complete OTP Flow

# 1. Fresh database
./scripts/testing/test-runner.sh stop
rm -f daptin.db
./scripts/testing/test-runner.sh start

# 2. Create user
./scripts/testing/test-runner.sh post /action/user_account/signup \
  '{"attributes":{"name":"Test","email":"test@test.com","password":"testtest","passwordConfirm":"testtest"}}'

# 3. Get auth token
./scripts/testing/test-runner.sh token

# 4. Enable OTP
TOKEN=$(cat /tmp/daptin-token.txt)
curl -X POST http://localhost:6336/action/user_otp_account/send_otp \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"attributes":{"email":"test@test.com","mobile_number":"5550123"}}'

# 5. Generate OTP
go run generate_otp.go
# Output: Current OTP: 3721

# 6. Verify OTP
curl -X POST http://localhost:6336/action/user_otp_account/verify_mobile_number \
  -H "Content-Type: application/json" \
  -d '{"attributes":{"email":"test@test.com","otp":"3721"}}'

# 7. Verify JWT token received
# 8. Check verified flag set to 1

Expected: All steps succeed, JWT token issued.

Test Scenario 2: Invalid OTP

# After enabling OTP...
curl -X POST http://localhost:6336/action/user_otp_account/verify_mobile_number \
  -H "Content-Type: application/json" \
  -d '{"attributes":{"email":"test@test.com","otp":"0000"}}'

Expected: Error response "Invalid OTP"

Test Scenario 3: Expired OTP

# Generate OTP
go run generate_otp.go
# Wait 6 minutes (beyond 5-minute validity + 1-minute skew)
sleep 360

# Try to verify
curl -X POST http://localhost:6336/action/user_otp_account/verify_mobile_number \
  -H "Content-Type: application/json" \
  -d '{"attributes":{"email":"test@test.com","otp":"OLD_CODE"}}'

Expected: Error response "Invalid OTP"

API Reference

REST Endpoints

Method Endpoint Description
POST /action/user_otp_account/send_otp Create OTP profile
POST /action/user_otp_account/verify_mobile_number Verify OTP and login
GET /api/user_otp_account List OTP profiles (auth required)

Action Schemas

send_otp

{
  "Name": "send_otp",
  "Label": "Send OTP to mobile",
  "OnType": "user_otp_account",
  "InstanceOptional": true,
  "InFields": [
    {
      "Name": "mobile_number",
      "ColumnType": "label",
      "IsNullable": true
    },
    {
      "Name": "email",
      "ColumnType": "label",
      "IsNullable": true
    }
  ],
  "OutFields": [
    {
      "Type": "otp.generate",
      "Method": "EXECUTE",
      "Attributes": {
        "email": "~email",
        "mobile": "~mobile_number"
      }
    }
  ]
}

verify_mobile_number

{
  "Name": "verify_mobile_number",
  "Label": "Verify Mobile Number",
  "OnType": "user_otp_account",
  "InstanceOptional": true,
  "InFields": [
    {
      "Name": "mobile_number",
      "ColumnType": "label"
    },
    {
      "Name": "email",
      "ColumnType": "label"
    },
    {
      "Name": "otp",
      "ColumnType": "label"
    }
  ],
  "OutFields": [
    {
      "Type": "otp.login.verify",
      "Method": "EXECUTE",
      "Attributes": {
        "otp": "~otp",
        "mobile": "~mobile_number",
        "email": "~email"
      }
    }
  ]
}

Related Documentation

Changelog

2026-01-26 - Tested ✓

  • Complete testing on fresh database
  • Verified all actions work correctly
  • Documented actual behavior (not assumed)
  • Added decrypt/generate OTP script
  • Corrected action names (send_otp, verify_mobile_number)
  • Added edge cases and troubleshooting
  • Production setup guidance

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