Can't create User and send Verification

import {Client, Databases, Account, Avatars} from 'appwrite';
import {environment} from '@environment/environment';

export const client = new Client();

client
  .setEndpoint('<endpoint>') // blanked but set in my Code
  .setProject(environment.projectId)
  .setLocale('de-DE');

export const account: Account = new Account(client);
export const databases: Databases = new Databases(client);
export const avatars: Avatars = new Avatars(client);

export { ID } from 'appwrite';

async signIn(email: string, password: string) {
    try {
      await account.deleteSession('current');

      const session = account.createEmailPasswordSession(email, password);

      session.then((response) => {
        console.info('Session created', response);
      }).catch((error) => {
        console.error('Session creation failed', error);
      })

      const user = await account.get();

      if (!user) {
        console.error('User not found');
        this.toast.error('User not found');
        return;
      }

    } catch (err) {
      console.error(err);
      throw new Error;
    }
  }

  async signUp(email: string, password: string, username: string) {
    try {
      const newAccount = await account.create(ID.unique(), email, password, username);

      if (!newAccount) {
        console.error('Account creation failed');
        this.toast.error('Account creation failed');
        return;
      }

      const avatarUrl = avatars.getInitials(username);

      await this.signIn(email, password);
      
      // Tried with verification here
      // await account.createVerification('https://environment.baseUrl/verify');

      const newUser = await databases.createDocument(
        this.databaseId,
        this.collectionId,
        ID.unique(),
        {
          userId: newAccount.$id,
          email,
          username,
          avatar: avatarUrl
        }
      );

      return newUser;
    } catch (err) {
      console.error(err);
      throw new Error;
    }
  }

async signIn(email: string, password: string) {
  try {
    const session = await account.createEmailPasswordSession(email, password);
    const user = await account.get();

    if (!user) {
      console.error('User not found');
      this.toast.error('User not found');
      return;
    }

  } catch (err) {
    console.error(err);
    throw new Error;
  }
}