API method aliasing not working

[brundage]

1.9.3p0 :012 > checkins = nrb.beer_feed bid: 34140, limit: 100
TypeError: can't convert nil into Hash
    from drink-socially/lib/drink-socially/api/credential.rb:47:in `merge'
    from drink-socially/lib/drink-socially/api/credential.rb:47:in `merge'
    from drink-socially/lib/drink-socially/api.rb:108:in `get_config'
    from drink-socially/lib/drink-socially/api.rb:38:in `api_call'
    from drink-socially/lib/drink-socially/api.rb:66:in `block in api_call_lambda'
    from (irb):12
    from rubies/ruby-1.9.3-p0/bin/irb:16:in `<main>'