docs: func (s *CreateEnvironmentMembershipInput) Validate() error {
  	invalidParams := request.ErrInvalidParams{Context: "CreateEnvironmentMembershipInput"}
  	if s.EnvironmentId == nil {
  		invalidParams.Add(request.NewErrParamRequired("EnvironmentId"))
  	}
  	if s.Permissions == nil {
  		invalidParams.Add(request.NewErrParamRequired("Permissions"))
  	}
  	if s.UserArn == nil {
  		invalidParams.Add(request.NewErrParamRequired("UserArn"))
  	}
  
  	if invalidParams.Len() > 0 {
  		return invalidParams
  	}
  	return nil
  }