[Child Issue] Test Cases for Signup Mutation

[sumitra19jha]

Is your feature request related to a problem? Please describe.
Test Case is required for Signup Mutation

Describe the solution you'd like
As the new user login into the system, we take user input and returns the AuthData (including token). When creating the test issue please cover all the business logic involved in the process. Go through the Signup Mutation for understanding the logic.

Additional context
Parent Issue:

• [Parent-Issue] Creating Test Cases for Login/Signup  #361

[sandeep-v1404]

Can I work on this issue?