* Add initial working Duo Universal Prompt support.
* Add db schema and models for Duo 2FA state storage
* store duo states in the database and validate during authentication
* cleanup & comments
* bump state/nonce length
* replace stray use of TimeDelta
* more cleanup
* bind Duo oauth flow to device id, drop redundant device type handling
* drop redundant alphanum string generation code
* error handling cleanup
* directly use JWT_VALIDITY_SECS constant instead of copying it to DuoClient instances
* remove redundant explicit returns, rustfmt
* rearrange constants, update comments, error message
* override charset on duo state column to ascii for mysql
* Reduce twofactor_duo_ctx state/nonce column size in postgres and maria
* Add fixes suggested by clippy
* rustfmt
* Update to use the make_http_request
* Don't handle OrganizationDuo
* move Duo API endpoint fmt strings out of macros and into format! calls
* Add missing indentation
Co-authored-by: Daniel García <dani-garcia@users.noreply.github.com>
* remove redundant expiry check when purging Duo contexts
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Co-authored-by: BlackDex <black.dex@gmail.com>
Co-authored-by: Daniel García <dani-garcia@users.noreply.github.com>
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