some adjusts

Author: luancazarine

components/sendgrid/actions/common/common.mjs

@@ -93,6 +93,9 @@ export default {
      * @param {object} value the value to check for returning `undefined`.
      */
     convertEmptyStringToUndefined(value) {
+      if (Array.isArray(value) && value.length === 0) {
+        return undefined;
+      }
       if (value === "" || value === null) {
         return undefined;
       }

components/sendgrid/actions/send-email-multiple-recipients/send-email-multiple-recipients.mjs

@@ -226,7 +226,7 @@ export default {
       };
     }
     this.sendAt = this.convertEmptyStringToUndefined(Date.parse(this.sendAt));
-    if (this.sendAt != null) {
+    if (this.sendAt) {
       constraints.sendAt = this.getIntegerGtZeroConstraint();
     }
     if (this.asm || this.asmGroupsToDisplay) {

components/sendgrid/actions/send-email-single-recipient/send-email-single-recipient.mjs

@@ -250,7 +250,7 @@ export default {
       };
     }
     this.sendAt = this.convertEmptyStringToUndefined(Date.parse(this.sendAt));
-    if (this.sendAt != null) {
+    if (this.sendAt) {
       constraints.sendAt = this.getIntegerGtZeroConstraint();
     }
     //Executes validation