diff --git a/server/swagger.json b/server/swagger.json
index edfda99..c6878c9 100644
--- a/server/swagger.json
+++ b/server/swagger.json
@@ -14,7 +14,7 @@
     "v1/auth/signup": {
       "post": {
         "tags": [
-          "Signup"
+          "Auth"
         ],
         "summary": "Users can signup",
         "description": "this endpoint uses get request to create users",
@@ -65,7 +65,7 @@
     "v1/auth/signup/addstaff": {
       "post": {
         "tags": [
-          "Signup"
+          "Auth"
         ],
         "summary": "Admin can signup staffs",
         "description": "this endpoint uses get request to create users",
@@ -135,7 +135,7 @@
     "v1/auth/signin": {
       "post": {
         "tags": [
-          "Signin"
+          "Auth"
         ],
         "summary": "Users can signup",
         "description": "this endpoint uses get request to create users",
diff --git a/server/v1/model/transaction.js b/server/v1/model/transaction.js
new file mode 100644
index 0000000..6538568
--- /dev/null
+++ b/server/v1/model/transaction.js
@@ -0,0 +1,10 @@
+export default class Transaction {
+  constructor() {
+    this.transactionId = null;
+    this.accountNumber = null;
+    this.amount = null;
+    this.cashier = null; // cashier id
+    this.transactionType = null; // credit or debit
+    this.accountBalance = null;
+  }
+}
diff --git a/server/v1/services/accounts.js b/server/v1/services/accounts.js
index ebf8519..5e31f4a 100644
--- a/server/v1/services/accounts.js
+++ b/server/v1/services/accounts.js
@@ -18,7 +18,7 @@ const CreateAccountService = {
 
     // pulling users data from database
     const userDetails = await dbConnection
-      .dbConnect('SELECT id,firstname,lastname FROM users WHERE email=$1',
+      .dbConnect('SELECT * FROM users WHERE email=$1',
         [userData.email]);
     const { firstname, lastname, id } = userDetails.rows[0];
 
diff --git a/server/v1/services/transaction.js b/server/v1/services/transaction.js
index 3c22b0f..970921e 100644
--- a/server/v1/services/transaction.js
+++ b/server/v1/services/transaction.js
@@ -33,9 +33,7 @@ const TransactionService = {
         );
       const { accountnumber, balance } = accountDbData.rows[0];
 
-      // check if a string
-      const checkForDigit = /^-?\d+\.?\d*$/;
-      if (checkForDigit.test(transactionData.amount)) {
+      if (typeof transactionData.amount === 'number') {
         // substract the passed in amount from the current balance
         const newBalance = balance - transactionData.amount;
 
@@ -132,9 +130,7 @@ const TransactionService = {
         );
       const { accountnumber, balance } = accountDbData.rows[0];
 
-      // check if a string
-      const checkForDigit = /^-?\d+\.?\d*$/;
-      if (checkForDigit.test(transactionData.amount)) {
+      if (typeof transactionData.amount === 'number') {
         if (transactionData.amount <= 0) {
           returnStatus = 422;
           returnError = 'please credit an account with positive value';