7: update register form with validators

Author: TommiCodes

src/app/public/components/register/register.component.html

@@ -36,7 +36,6 @@
           Last Name is required</mat-error>
       </mat-form-field>
 
-
       <mat-form-field>
         <input type="password" matInput placeholder="Password" formControlName="password">
         <mat-error
@@ -51,6 +50,10 @@
           Password Confirmation is required</mat-error>
       </mat-form-field>
 
+      <mat-error
+        *ngIf="this.registerForm.get('passwordConfirm')?.dirty && this.registerForm.hasError('passwordsNotMatching')">
+        Passwords are not matching!</mat-error>
+
       <div class="button">
         <!-- Button is disabled(not clickable), if our RegisterForm contains Validation Errors -->
         <button type="submit" mat-button [disabled]="!registerForm.valid">Register</button>