Password requirement custom message (#5399)

* Added validationError(custom message) for Password requirement fail

* Changed validationError from valodationError in README.md

README.md

@@ -326,8 +326,9 @@ var server = ParseServer({
     // If both are specified, both checks must pass to accept the password
     // 1. a RegExp object or a regex string representing the pattern to enforce 
     validatorPattern: /^(?=.*[a-z])(?=.*[A-Z])(?=.*[0-9])(?=.{8,})/, // enforce password with at least 8 char with at least 1 lower case, 1 upper case and 1 digit
-    // 2. a callback function to be invoked to validate the password  
+    // 2. a callback function to be invoked to validate the password
     validatorCallback: (password) => { return validatePassword(password) }, 
+    validationError: 'Password must contain at least 1 digit.' // optional error message to be sent instead of the default "Password does not meet the Password Policy requirements." message.
     doNotAllowUsername: true, // optional setting to disallow username in passwords
     maxPasswordAge: 90, // optional setting in days for password expiry. Login fails if user does not reset the password within this period after signup/last reset. 
     maxPasswordHistory: 5, // optional setting to prevent reuse of previous n passwords. Maximum value that can be specified is 20. Not specifying it or specifying 0 will not enforce history.