old_contents: class DevelopmentConfig(object):
      DATABASE_URI = "postgresql://action:action@localhost:5432/posts"
      DEBUG = True
  
  class TestingConfig(object):
      DATABASE_URI = "postgresql://action:action@localhost:5432/posts-test"
      DEBUG = True
  
new_contents: class DevelopmentConfig(object):
      DATABASE_URI = "postgresql://ubuntu:thinkful@localhost:5432/posts"
      DEBUG = True
  
  class TestingConfig(object):
      DATABASE_URI = "postgresql://ubuntu:thinkful@localhost:5432/posts-test"
      DEBUG = True
  
subject: Update database URIs for C9.