Long: oauth2-bearer
Help: OAuth 2 Bearer Token
Protocols: IMAP POP3 SMTP
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Specify the Bearer Token for OAUTH 2.0 server authentication. The Bearer Token
is used in conjunction with the user name which can be specified as part of
the --url or --user options.

The Bearer Token and user name are formatted according to RFC 6750.

If this option is used several times, the last one will be used.
