add aws secret manager support

[gingfrederik]

add support for aws secret manager for storing the eth private key and cryptowatch key

[0xtrooper]

Hey, thanks for this PR.

1. Can you explain what the advantage this PR brings, as it would just switch from stroing the private key directly to storing the secret to fetch the private key.
2. Please dont use prettier for PR for other projects. Its really hard to tell what has changed.

[gingfrederik]

Hi Trooper,
Appreciate for taking the time to review the PR.

1. It benefits the user using the AWS service or local machine. AWS IAM can handle the credentials for fetching private keys. AWS Secrets Manager will safely store the key for users, also it will have the ability to know who and where the data has been fetched. They will never need to type their private key on the machine, not even in env. There will be NO information be stored in the machine
2. Apology for that, it is my first time trying to contribute.

[gingfrederik]

Sorry for the force-push. I stop the prettier.
The part mentioned above has been fixed

Appreciate for taking the time to review the PR again.