modify sql method of getting all data requests and build capture access api

[ho-yi-shiuan]

change sql.execute to sql.query for getting all data requests, also add check if result is black; build api for getting access list for captures

related to #43

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Testing
• Change that requires a documentation update

How Has This Been Tested?

getting data request: not solved
capture access api: check api by going to /courses/permissions/:courseId

• Manual Test
• Unit Test
• Integration / End-to-End Test

Test Configuration:

Chrome Version 96.0.4664.45 (Official Build) (32-bit)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas that are not self-documenting
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• My changes have no unnecessary logging
• I have added tests that prove my fix is effective or that my feature works, for sufficiently complex features
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• Sensitive info like tokens, secrets, and passwords have been removed before submitting

Modified from this article:
Phillip Johnston, “A GitHub Pull Request Template for Your Projects - Embedded Artistry,” Embedded Artistry, Aug. 04, 2017. https://embeddedartistry.com/blog/2017/08/04/a-github-pull-request-template-for-your-projects/ (accessed Jul. 22, 2021).

[parseccentric]

Known issue: #43