         throw new Error("Can't find credentials for project '#{credentials.project_key}'.")
 
   _normalizePath: (path) ->
-    if not path? or _s.isBlank(path)
+    if not path? or _.isBlank(path)
       throw new Error("Path is empty!")
 
     path.replace "~", @_getUserHome()

Q = require 'q'
fs = require 'q-io/fs'
{_} = require 'underscore'
_s = require 'underscore.string'

csv = require 'csv'


        if exists
          fs.read path, 'r'
          .then (contents) =>
            if _.endsWith(normalizedPath, ".json")
              @_readJsonConfig "#{contents}"
            else
              @_readCsvConfig "#{contents}"
