Tyleryasaka/simplify attestations

[tyleryasaka]

Checklist:

• [x] Code contains relevant tests for the problem you are solving
• [x] Ensure all new and existing tests pass
• [x] Update any relevant READMEs and docs
• [x] Submit to the develop branch instead of master

Description:

Adds support for redirect url handlers and uses those automatically, rather than accepting redirect url as a param.