#89 fixed

src/frontend/src/app/dialogs/create-token-dialog/create-token-dialog.html

@@ -28,14 +28,21 @@
 
 
     <nz-form-item class="analytics-token-description">
-      <nz-form-label [nzSpan]="10">Description</nz-form-label>
-      <nz-form-control [nzSpan]="14">
-        <textarea
-          nz-input
-          [rows]="5"
-          placeholder="Description"
-          [formControl]="descriptionController"
-          autocomplete="off"></textarea>
+      <nz-form-label nzRequired [nzSpan]="10">Description</nz-form-label>
+      <nz-form-control [nzSpan]="14" [nzErrorTip]="descriptionError">
+        <nz-input-group>
+          <textarea
+            nz-input
+            [rows]="5"
+            placeholder="Description"
+            [formControl]="descriptionController"
+            autocomplete="off"></textarea>
+        </nz-input-group>
+        <ng-template #descriptionError let-control>
+          <ng-container *ngIf="control.hasError('required')">
+            Description is <strong>required</strong>
+          </ng-container>
+        </ng-template>
       </nz-form-control>
     </nz-form-item>
 

src/frontend/src/app/dialogs/create-token-dialog/create-token-dialog.ts

@@ -33,7 +33,7 @@ export class CreateTokenDialog implements OnInit {
   ) {
     this.form = this._formBuilder.group({
       expires: [null, validateDate()],
-      description: [null],
+      description: ['', Validators.required],
       name: [
         '',
         Validators.required,