Add Edit Role API Endpoint

[shencynthia]

Notion Ticket Link

Create Edit Role API

Implementation Description

• Added a new service to update a user's role by their ID - only accessible by admins
• Added a resolver for the service

Steps to Test

1. Navigate to the GraphQL playground: localhost:8080/graphql
2. Login using this mutation:

mutation Login($email: String!, $password: String!) {
  login(email: $email, password: $password) {
    accessToken
    id
  }
}

Query variables:

{
  "email": "<[email protected]"",
  "password": "<yourpassword>"
}

4. From the MongoDB Console, ensure the account that you are logged in with has the role "Admin", if not you can change it in the console.
5. Open a new tab to run the updateUserRole mutation:

mutation UpdateUserRole($id: ID!, $role: Role!) {
  updateUserRole(id: $id, role: $role)
}

Query variables:

{
  "id": "<your id (from the login mutation)>",
  "role": "Volunteer"
}

HTTP Headers:
Link for access_token value

{
	"authorization": "bearer  <access token (from the login mutation)>",
	"access_token": "<from the notion link above"
}

6. The output should be "updateUserRole": null since it's a void function. If you try running the query again it will not work since your role should now be Volunteer. Also, can also check that it updated in the MongoDB console.

Checklist

• My PR name is descriptive and in imperative tense
• My commit messages are descriptive and in imperative tense. My commits are atomic and trivial commits are squashed or fixup'd into non-trivial commits
• I have run the appropriate linter(s)
• I have requested a review from the PL, as well as other devs who have background knowledge on this PR or who will be building on top of this PR

Linting & Formatting

Mac

docker exec -it CWC-backend /bin/bash -c "yarn fix"
docker exec -it CWC-frontend /bin/bash -c "yarn fix"

Windows

docker exec -it CWC-backend bash -c "yarn fix"
docker exec -it CWC-frontend bash -c "yarn fix"

[achandrabalan]

LOCKEDDD IN !!
LGTM

[carolynzhang18]

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