code: public AdminGetUserResult withMFAOptions(MFAOptionType... mFAOptions) {
          if (this.mFAOptions == null) {
              setMFAOptions(new java.util.ArrayList<MFAOptionType>(mFAOptions.length));
          }
          for (MFAOptionType ele : mFAOptions) {
              this.mFAOptions.add(ele);
          }
          return this;
      }
docs: <p>
  Specifies the options for MFA (e.g., email or phone number).
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setMFAOptions(java.util.Collection)} or {@link #withMFAOptions(java.util.Collection)} if you want to
  override the existing values.
  </p>
  
  @param mFAOptions
  Specifies the options for MFA (e.g., email or phone number).
  @return Returns a reference to this object so that method calls can be chained together.