docs: func (s *JoinDomainInput) Validate() error {
  	invalidParams := request.ErrInvalidParams{Context: "JoinDomainInput"}
  	if s.DomainName == nil {
  		invalidParams.Add(request.NewErrParamRequired("DomainName"))
  	}
  	if s.DomainName != nil && len(*s.DomainName) < 1 {
  		invalidParams.Add(request.NewErrParamMinLen("DomainName", 1))
  	}
  	if s.GatewayARN == nil {
  		invalidParams.Add(request.NewErrParamRequired("GatewayARN"))
  	}
  	if s.GatewayARN != nil && len(*s.GatewayARN) < 50 {
  		invalidParams.Add(request.NewErrParamMinLen("GatewayARN", 50))
  	}
  	if s.OrganizationalUnit != nil && len(*s.OrganizationalUnit) < 1 {
  		invalidParams.Add(request.NewErrParamMinLen("OrganizationalUnit", 1))
  	}
  	if s.Password == nil {
  		invalidParams.Add(request.NewErrParamRequired("Password"))
  	}
  	if s.Password != nil && len(*s.Password) < 1 {
  		invalidParams.Add(request.NewErrParamMinLen("Password", 1))
  	}
  	if s.UserName == nil {
  		invalidParams.Add(request.NewErrParamRequired("UserName"))
  	}
  	if s.UserName != nil && len(*s.UserName) < 1 {
  		invalidParams.Add(request.NewErrParamMinLen("UserName", 1))
  	}
  
  	if invalidParams.Len() > 0 {
  		return invalidParams
  	}
  	return nil
  }