Fixed Issue #272 . Email validation issue solved

Fixes #272 (closed)

Changes :
After the user will click "Sign Up" button, the app will first validate all the inputs given by user along with the email field . In case,the email provided by the user is not valid it will show an error message and will not call the signup api.This will not allow the user to sign up in the app if any of the inputs are invalid.

Screenshots for the change :
screen-20210312-092333_918x1990