title: AWS::Errors::MissingCredentialsError in LocationsController#create Using paperclip and aws Gem
body: <p>Im getting the following error <strong>AWS::Errors::MissingCredentialsError</strong> in LocationsController#create with paperclip and AWS gem</p>
  
  <p>more details on the exception: </p>
  
  <pre><code>Missing Credentials. Unable to find AWS credentials. 
  You can configure your AWS  credentials a few different ways: 
  * Call AWS.config with :access_key_id and :secret_access_key 
  * Export AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY to ENV * 
  </code></pre>
  
  <p>I'm currently running this code in a development environment on my machine Here is the <strong>development.rb</strong></p>
  
  <pre><code>  Gmaps::Application.configure do
    # Settings specified here will take precedence over those in config/application.rb
  
    # In the development environment your application's code is reloaded on
    # every request. This slows down response time but is perfect for development
    # since you don't have to restart the web server when you make code changes.
    config.cache_classes = false
  
    # Log error messages when you accidentally call methods on nil.
    config.whiny_nils = true
  
    # Show full error reports and disable caching
    config.consider_all_requests_local       = true
    config.action_controller.perform_caching = false
  
    # Don't care if the mailer can't send
    config.action_mailer.raise_delivery_errors = false
  
    # Print deprecation notices to the Rails logger
    config.active_support.deprecation = :log
  
    # Only use best-standards-support built into browsers
    config.action_dispatch.best_standards_support = :builtin
  
    # Raise exception on mass assignment protection for Active Record models
    config.active_record.mass_assignment_sanitizer = :strict
  
    # Log the query plan for queries taking more than this (works
    # with SQLite, MySQL, and PostgreSQL)
    config.active_record.auto_explain_threshold_in_seconds = 0.5
  
    # Do not compress assets
    config.assets.compress = false
  
    # Expands the lines which load the assets
    config.assets.debug = true
  
    # Amazon S3 settings for Paperclip uploads
  Paperclip::Attachment.default_options.merge!({  
  storage: :s3 ,
  s3_credentials: {
    access_key_id:  ENV['key_id'],
    secret_access_key:  ENV['key'],
      bucket:  "#{ENV['bucket']}-#{Rails.env}"
      },
      url: ":s3_domain_url",
     path: "/:class/:attachment/:id_partition/:style/:filename"
      })
  end
  </code></pre>
  
  <p>here is my model</p>
  
  <pre><code>class Location &lt; ActiveRecord::Base
      geocoded_by :address
      after_validation :geocode
  
        has_attached_file :picture,
          :styles =&gt; { :medium =&gt; "300x300&gt;", :thumb =&gt; "100x100&gt;" }
  end
  </code></pre>
  
  <p>thanks for taking the time to look at this</p>