test: create event mutation & events query unit tests

[sandeep-v1404]

What kind of change does this PR introduce?

refactoring

Issue Number:

Fixes #513
Fixes #543

Did you add tests for your changes?

Yes

Snapshots/Videos:

If relevant, did you update the documentation?

Summary

• To fix issue Resolvers: Create tests for createEvent.js #513
• To fix issue Resolvers: Create tests for events.js #543
• To cover the unit testing for event resolvers

Does this PR introduce a breaking change?

No

Other information

• Some Linting issues have been fixed with npm run lint.

Have you read the contributing guide?

Yes

[palisadoes]

@sandeep-v1404

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I'll close this PR.