关键是 不 登录，设置个人访问令牌并调用client.GetMe。通过查看python驱动程序源代码后，这一点变得很清楚。相关的片段是。

    fmt.Println("LoginAsTheBotUser", "Using personal access token")
    client.AuthToken = mattermost_personal_access_token
    client.AuthType = model.HEADER_TOKEN
    if user, resp := client.GetMe(""); resp.Error != nil {
        println("There was a problem logging into the Mattermost server.  Are you sure the access token is valid?")
        PrintError(resp.Error)
    } else {
        fmt.Println(client)
        botUser = user
        result = true
    }

上下文。

/* 
    mattermost_user_email, mattermost_user_password and mattermost_personal_access_token
    are globals set from reading a .env file on startup
    */
func LoginAsTheBotUser() bool {
    fmt.Println("LoginAsTheBotUser")
    fmt.Println("LoginAsTheBotUser", time.Now())
    var result bool = false
    if mattermost_personal_access_token == "" {
        fmt.Println("LoginAsTheBotUser", "Getting access token from login with username and password")
        if user, resp := client.Login(mattermost_user_email, mattermost_user_password); resp.Error != nil {
            println("There was a problem logging into the Mattermost server.  Are you sure ran the setup steps from the README.md?")
            PrintError(resp.Error)
        } else {
            fmt.Println(client)
            botUser = user
            result = true
        }
    } else {
        fmt.Println("LoginAsTheBotUser", "Using personal access token")
        client.AuthToken = mattermost_personal_access_token
        client.AuthType = model.HEADER_TOKEN
        if user, resp := client.GetMe(""); resp.Error != nil {
            //if user, resp := client.Login(mattermost_personal_access_token); resp.Error != nil {
            println("There was a problem logging into the Mattermost server.  Are you sure the access token is valid?")
            PrintError(resp.Error)
        } else {
            fmt.Println(client)
            botUser = user
            result = true
        }
    }
    fmt.Println("LoginAsTheBotUser", time.Now())
    fmt.Println("LoginAsTheBotUser")
    return result
}