Added ability to set a pin for settings menu

src/app/dialogs/set-pin-dialog/set-pin-dialog.component.ts

@@ -0,0 +1,22 @@
+import { Component } from '@angular/core';
+import { PostsService } from 'app/posts.services';
+
+@Component({
+  selector: 'app-set-pin-dialog',
+  templateUrl: './set-pin-dialog.component.html',
+  styleUrls: ['./set-pin-dialog.component.scss']
+})
+export class SetPinDialogComponent {
+  pin: string;
+  constructor(private postsService: PostsService) {
+    
+  }
+
+  setPin() {
+    this.postsService.setPin(this.pin).subscribe(res => {
+      if (res['success']) {
+        this.postsService.openSnackBar($localize`Successfully set pin!`);
+      }
+    });
+  }
+}