converts pem format to rsa public key.

ErrMissingField returns a logical response error that prints a consistent error message for when a required field is missing.

GenerateOTP - generate random number of length passed.

New returns an error that formats as the given text.

NewUUID returns a globally unique random generated guid.

UUIDExists checks if uuid exists or not.

ValidateData - validates data provided provided to create signature.

ValidateFields verifies that no bad arguments were given to the request.

ValidationErr returns an error that corresponds to a validation error.

verifies if data is signed using passed public key.

User -- stores data related to user.