Removed unnecessary else blocks

[lmpham1]

Description

Removed unnecessary else blocks and replaced them with a simple return statement in 2 files: /NearBeach/private_media.py and /NearBeach/views/authentication_views.py

This fixes #268

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)
• Database change that requires a migration
• This change requires a documentation update

How Has This Been Tested?

• Local manual testing via "./manage runserver"
• Local Python Unit Testing via "./manage test"
• Local Cypress E2E Testing
• Tested on virtual box
• Tested on server

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

[robotichead]

Thank you :)