Custom account email verification through adapter #1946

[muneeb706]

Submitting Pull Requests

General

• [x] Make sure you use semantic commit messages. Examples: "fix(google): Fixed foobar bug", "feat(accounts): Added foobar feature".
• [x] All Python code must formatted using Black, and clean from pep8 and isort issues.
• [ ] JavaScript code should adhere to StandardJS.
• [x] If your changes are significant, please update ChangeLog.rst.
• [x] If your change is substantial, feel free to add yourself to AUTHORS.

Provider Specifics

N/A

• [x] Make sure unit tests are available.
• [ ] Add an entry of your provider in test_settings.py::INSTALLED_APPS and docs/installation.rst::INSTALLED_APPS.
• [ ] Add documentation to docs/providers/<provider name>.rst and docs/providers/index.rst Provider Specifics toctree.
• [ ] Add an entry to the list of supported providers over at docs/overview.rst.