Improve login

src/app/pages/login/login.component.html

@@ -1,6 +1,6 @@
 <div id="login-form">
   <h1>fLotte Login</h1>
-  <mat-form-field>
+  <mat-form-field (keyup.enter)="login()">
     <mat-label>E-Mail-Adresse eingeben</mat-label>
     <input matInput placeholder="fLotte@beispiel.de" [formControl]="email" />
     <mat-error *ngIf="email.hasError('required')">
@@ -11,7 +11,7 @@
     </mat-error>
   </mat-form-field>
 
-  <mat-form-field>
+  <mat-form-field (keyup.enter)="login()">
     <mat-label>Passwort eingeben</mat-label>
     <input
       matInput