Feature/sponsor get self

[YiFeiZhang2]

Description

Create a /self route for sponsors to get sponsor information from logged in user. This will be used for sponsor creation on the front end, and as part of a new HOC.

Type of change

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

How Has This Been Tested?

Created new tests:

• fail due to authentication
• fail due to authorization
• fail due to wrong account type
• fail due to sponsor not created yet
• succeed to get sponsor information from logged in user

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
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[pierreTklein]

Made a mistake with the previous review