Added method to find User with their email & find User with a PubKey Buffer.

backend/src/typeorm/repository/User.ts

@@ -9,6 +9,15 @@ export class UserRepository extends Repository<User> {
       .getOneOrFail()
   }
 
+  async findByPubkeyHexBuffer(pubkeyHexBuffer: Buffer): Promise<User> {
+    const pubKeyString = pubkeyHexBuffer.toString('hex')
+    return await this.findByPubkeyHex(pubKeyString)
+  }
+
+  async findByEmail(email: string): Promise<User> {
+    return this.createQueryBuilder('user').where('user.email = :email', { email }).getOneOrFail()
+  }
+
   async getUsersIndiced(userIds: number[]): Promise<User[]> {
     if (!userIds.length) return []
     const users = await this.createQueryBuilder('user')