Struct AuthCodeStart 

pub struct AuthCodeStart {
    pub authorize_url: String,
    pub redirect_uri: String,
    pub extra: Option<Value>,
}

The output of ChannelLogin::authcode_start: where to send the user, and the redirect_uri the channel actually used.

redirect_uri is echoed back so the matching complete exchanges the code with the SAME value the authorize step advertised — OAuth requires them to match. A channel with a fixed redirect_uri ignores the caller’s hint and returns its own here.

Fields

authorize_url: String

redirect_uri: String

extra: Option<Value>

Opaque channel-owned state minted at start (e.g. a dynamically-registered OAuth client’s client_id/client_secret/region for AWS IdC) that the matching complete must hand back to authcode_exchange. None for static flows whose authorize URL needs no prior network call.