docs: function authorizationUri (options) {
    var u = url.parse(this.configuration.authorization_endpoint)
  
    // assign endpoint and ensure options
    var endpoint = 'authorize'
    if (typeof options === 'string') {
      endpoint = options
      options = {}
    } else if (typeof options === 'object') {
      endpoint = options.endpoint
    } else {
      options = {}
    }
  
    // pathname
    u.pathname = endpoint
  
    // request params
    u.query = this.authorizationParams(options)
  
    return url.format(u)
  }