introduce an authentication service and prepare user management

src/auth/models/user.model.ts

@@ -0,0 +1,44 @@
+import { Prop, Schema, SchemaFactory } from '@nestjs/mongoose';
+import { Document } from 'mongoose';
+
+export type UserDocument = User & Document;
+
+@Schema()
+export class User {
+  @Prop({
+    required: true,
+    index: true,
+    type: String,
+  })
+  vatsimId: string;
+
+  @Prop({
+    type: String,
+  })
+  fullName: string;
+
+  @Prop({
+    required: true,
+    type: String,
+  })
+  vatsimToken: string;
+
+  @Prop({
+    type: String,
+  })
+  vatsimRefreshToken: string;
+
+  @Prop({
+    type: Boolean,
+    default: false,
+  })
+  administrator: boolean;
+
+  @Prop({
+    type: [String],
+    default: [],
+  })
+  airportConfigurationAccess: string[];
+}
+
+export const UserSchema = SchemaFactory.createForClass(User);