first commit

src/auth/auth.service.ts

@@ -0,0 +1,22 @@
+import { Injectable, UnauthorizedException } from '@nestjs/common';
+import { JwtService } from '@nestjs/jwt';
+import { ConfigService } from '@nestjs/config';
+
+@Injectable()
+export class AuthService {
+  constructor(
+    private jwtService: JwtService,
+    private configService: ConfigService,
+  ) {}
+
+  async login(password: string) {
+    const envPassword = this.configService.get<string>('PASSWORD');
+    if (password !== envPassword) {
+      throw new UnauthorizedException('Incorrect password');
+    }
+    const payload = { username: 'admin', sub: 'admin' };
+    return {
+      accessToken: this.jwtService.sign(payload),
+    };
+  }
+}