NoMongo: Postgres Migration Support for Block/Unblock in orgDashboard

[gautam-divyanshu]

Is your feature request related to a problem? Please describe.
Update query and mutations according to the recently migrated develop-postgres branch of talawa-api.

Describe the solution you'd like
Make the schema support the changes

Additional context

Potential internship candidates

Please read this if you are planning to apply for a Palisadoes Foundation internship

• Student Internship Programs talawa#359

[hustlernik]

@palisadoes Please assign.

[hustlernik]

@palisadoes I have not created an issue but I will work on Block/Unblock feature, also membership request feature as we do not have these functionality on api.

[palisadoes]

This issue aims to restore functionality to the app after migrating to a PostgreSQL API back end.

1. This is a high priority issue. It's a prerequisite for our GSoC ideas.
2. The develop branches of Talawa Admin and Talawa API work together. Use those branches to determine the expected behavior of the apps.
3. Compare the operation of Talawa Admin and Talawa API running together in the develop-postgres branch.
4. Submit your PR against the develop-postgres branch and attach a video.