Describe the bug

When I run dbt compile against our redshift data warehouse the command fails with the error

KeyError: 'endpoint_resolver'

The error only occurs when threads > 1 and method: iam is used.

From what I can gather this is happening because the boto session object is not thread safe and it is being accessed from multiple threads without being protected, and this

Is your feature request related to a problem? If so, please describe the problem:
When installing Augur, I tried to set up a local database. When creating database credentials, the password was not hidden while I was typing it in.

Potential solutions:
Please implement password hiding in the install, if you can.

Additional context:
The places I found this issue were in creating