Fixmigrationwallet

[waelhanfi04]

Summary:
This pull request aims to enhance the authentication and balance fetching logic within the codebase. It introduces changes to the verifyAccount method and the determination of the wallet version based on the fetched balance.

Details:
In this pull request, we make the following modifications:

1. We use the verifyAccount method, which appears to be an asynchronous operation, and we utilize the pipe operator to handle the result.

2. Inside the pipe, we've introduced a tap operator to handle the result of the verifyAccount method asynchronously. This allows us to perform additional actions based on the verification result.

3. We've added an asynchronous operation to fetch the balance using the fetchBalance method and store it in the fetchedBalance variable.

4. We determine the walletVersion based on the value of fetchedBalance. If fetchedBalance is equal to 0.0, we set walletVersion to 'v1', otherwise, it's set to 'v2'.

Additional Context:
If there is any additional information or context that would be helpful for the reviewers to understand the changes better, please provide it here.

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