Extend or Make AWS SSO Login Timeout Configurable in AWSCTL

[Sunil-Bista]

Current 30-second timeout is too short due to MFA and other possible delays. Make this duration configurable via flag or config file.

[sanjog-lama]

@Sunil-Bista,

The above issue has been fixed on below PR. I have increased the time to 10 minutes.
#104

[Sunil-Bista]

@RajivBB Could you please verify this after PR getting merged