Update...

Update frontend/src/app/views/register/create.pasajero/create.pasajero.component.html, frontend/src/app/views/register/create.pasajero/create.pasajero.component.ts files

frontend/src/app/views/register/create.pasajero/create.pasajero.component.html

@@ -74,7 +74,7 @@
                                         <p style="color: red" class="error" *ngIf="passengerForm.get('phone_number')?.errors &&
                                         (passengerForm.get('phone_number')?.touched || passengerForm.get('phone_number')?.dirty)
                                             ">
-                                            Por favor, escriba su número de telefono
+                                            Por favor, escriba su número de telefono valido (9 digitos)
                                         </p>
                                         <div class="form-group mt-3"><label>Correo eléctronico</label>
                                             <input type="email" placeholder="Ingresar email"

frontend/src/app/views/register/create.pasajero/create.pasajero.component.ts

@@ -23,8 +23,9 @@ export class CreatePasajeroComponent {
       first_name: new FormControl('', Validators.required),
       second_name: new FormControl('', Validators.required),
       last_name: new FormControl('', Validators.required),
-      phone_number: new FormControl('', Validators.required),
-      email_address: new FormControl('', Validators.required),
+      phone_number: new FormControl('', [Validators.required, Validators.minLength(9),
+      Validators.maxLength(9)]),
+      email_address: new FormControl('', [Validators.required, Validators.email]),
       city: new FormControl('', Validators.required),
       country: new FormControl('', Validators.required),
       other_details: new FormControl('', Validators.required),