Support generating access_token for phone users via Admin API

[rohitsah01]

Feature Request

Please add support to issue Supabase-compatible access_token and refresh_token for users authenticated by phone (SMS OTP) via the Admin API.

Use Case

In custom backend OTP flows (like verifying OTP manually from our DB), we want to programmatically issue a session token for a valid phone user without requiring the client to re-trigger Supabase's signInWithOtp.

This would allow:

• Server-side session creation for phone-authenticated users
• Avoiding duplicate OTP messages
• *Better integration for external SMS services

Expected API

Something like:

const { data, error } = await supabase.auth.admin.generateSession({
  phone: "+919876543210"
})