[BUG] Populate user_guide/authentication

[andypbarrett]

Is this issue already tracked somewhere, or is this a new report?

• [X] I've reviewed existing issues and couldn't find a duplicate for this problem.

Current Behavior

User Guide Authentication page needs populating

Expected Behavior

Contains complete documentation with examples for authenticating using earthaccess

Steps To Reproduce

See https://earthaccess.readthedocs.io/en/latest/user_guide/authenticate/

Environment

- OS:
- Python:

Additional Context

No response

[andypbarrett]

Methods to document as defined in Auth

• login
  • strategy
  • persist
  • system
• get_s3_credentials
• get_fsspec_https_session - this maybe better in access
• get_requests_https_session - this maybe better in access
• get_edl_token

[andypbarrett]

@betolink we need to add documentation about refresh_tokens and get_session to the authentication user guide. Do you have any examples for how these would be used?

[betolink]

refresh_tokens() regenerates EDL bearer tokens, I don't have a lot of examples but the explanatory text can mention that in case a user has not used their EDL account for a while (I think 2 months) the tokens will expire, if no token is available the function will generate at least one token. Only 2 tokens per user are allowed by the API.

get_session() just returns a Python requests session with the bearer token.