better message formatting

api/pkg/model/demorequest.go

@@ -32,22 +32,22 @@ func (dr *DemoRequest) Normalize() {
 // Validate ensures that all required fields are present.
 func (dr *DemoRequest) Validate() error {
 	if dr == nil {
-		return merrors.InvalidArgument("request payload is empty")
+		return merrors.InvalidArgument("request payload is empty", "request")
 	}
 	if dr.Name == "" {
-		return merrors.InvalidArgument("name must not be empty")
+		return merrors.InvalidArgument("name must not be empty", "request.name")
 	}
 	if dr.OrganizationName == "" {
-		return merrors.InvalidArgument("organization name must not be empty")
+		return merrors.InvalidArgument("organization name must not be empty", "request.organizationName")
 	}
 	if dr.Phone == "" {
-		return merrors.InvalidArgument("phone must not be empty")
+		return merrors.InvalidArgument("phone must not be empty", "request.phone")
 	}
 	if dr.WorkEmail == "" {
-		return merrors.InvalidArgument("work email must not be empty")
+		return merrors.InvalidArgument("work email must not be empty", "request.workEmail")
 	}
 	if dr.PayoutVolume == "" {
-		return merrors.InvalidArgument("payout volume must not be empty")
+		return merrors.InvalidArgument("payout volume must not be empty", "request.payoutVolume")
 	}
 	return nil
 }