code: public GetAccountAuthorizationDetailsResult withUserDetailList(UserDetail... userDetailList) {
          if (this.userDetailList == null) {
              setUserDetailList(new com.amazonaws.internal.SdkInternalList<UserDetail>(userDetailList.length));
          }
          for (UserDetail ele : userDetailList) {
              this.userDetailList.add(ele);
          }
          return this;
      }
docs: <p>
  A list containing information about IAM users.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setUserDetailList(java.util.Collection)} or {@link #withUserDetailList(java.util.Collection)} if you want
  to override the existing values.
  </p>
  
  @param userDetailList
  A list containing information about IAM users.
  @return Returns a reference to this object so that method calls can be chained together.