fix(rdsinstance): Updates will now set ResourceCredentialsSecretUserK…

…ey in ConnectionDetails if masterUsername is set

Signed-off-by: Trystan Leftwich <trystanleftwich@gmail.com>

pkg/controller/database/rdsinstance/rdsinstance.go

@@ -277,12 +277,18 @@ func (e *external) Update(ctx context.Context, mg resource.Managed) (managed.Ext
 		return managed.ExternalUpdate{}, err
 	}
 	if changed {
-		conn = managed.ConnectionDetails{
-			xpv1.ResourceCredentialsSecretPasswordKey: []byte(pwd),
-		}
+		conn = managed.ConnectionDetails{xpv1.ResourceCredentialsSecretPasswordKey: []byte(pwd)}
 		modify.MasterUserPassword = aws.String(pwd)
 	}
 
+	if cr.Spec.ForProvider.MasterUsername != nil {
+		if conn != nil {
+			conn[xpv1.ResourceCredentialsSecretUserKey] = []byte(aws.ToString(cr.Spec.ForProvider.MasterUsername))
+		} else {
+			conn = managed.ConnectionDetails{xpv1.ResourceCredentialsSecretUserKey: []byte(aws.ToString(cr.Spec.ForProvider.MasterUsername))}
+		}
+	}
+
 	if _, err = e.client.ModifyDBInstance(ctx, modify); err != nil {
 		return managed.ExternalUpdate{}, errorutils.Wrap(err, errModifyFailed)
 	}