[Child Issue] Unit Testing the Block User Mutations

[sandeep-v1404]

Is your feature request related to a problem? Please describe.
Unit Testing required for Block User Mutations block_user, unblock_user.

Describe the solution you'd like

Go through the mutation codebase, and when creating the test issue please cover all the business logic involved in the process.

Describe alternatives you've considered
N/A

Approach to be followed (optional)

• Check signup.spec.js tests under tests-> resolver_tests folder.
• Check PR Test: Unit testing Signup Mutation #472

Additional context
Parent issue :

• [Parent Issue] Unit Testing for Codebase #471

[sandeep-v1404]

Closing this issue as it has been solved by #669