diff --git a/src/mechanize.cr b/src/mechanize.cr
index cc9e047..84091f4 100644
--- a/src/mechanize.cr
+++ b/src/mechanize.cr
@@ -296,6 +296,10 @@ class Mechanize
     end
   end
 
+  def add_auth(uri, user, pass)
+    @agent.add_auth(uri, user, pass)
+  end
+
   # Runs given block, then resets the page history as it was before.
   private def transact
     # save the previous history status.
diff --git a/src/mechanize/http/agent.cr b/src/mechanize/http/agent.cr
index 1852b39..74201e8 100644
--- a/src/mechanize/http/agent.cr
+++ b/src/mechanize/http/agent.cr
@@ -1,5 +1,6 @@
 require "../cookie"
 require "../history"
+require "./auth_store"
 
 class Mechanize
   module HTTP
@@ -10,6 +11,7 @@ class Mechanize
       property history : History
       property user_agent : String
       property request_cookies : ::HTTP::Cookies
+      getter auth_store : AuthStore
 
       def initialize(@context : Mechanize? = nil)
         @history = History.new
@@ -17,6 +19,7 @@ class Mechanize
         @context = context
         @request_cookies = ::HTTP::Cookies.new
         @user_agent = ""
+        @auth_store = AuthStore.new
       end
 
       # send http request and return page.
@@ -135,6 +138,10 @@ class Mechanize
         request_headers["Referer"] = referer.uri.to_s
       end
 
+      def add_auth(uri, user, pass)
+        @auth_store.add_auth(uri, user, pass)
+      end
+
       private def resolve_parameters(uri, method, params)
         case method
         when :get
diff --git a/src/mechanize/http/auth_store.cr b/src/mechanize/http/auth_store.cr
index 7167dbc..ad9976a 100644
--- a/src/mechanize/http/auth_store.cr
+++ b/src/mechanize/http/auth_store.cr
@@ -3,30 +3,31 @@ class Mechanize
     # This class store info for HTTP Authentication.
     class AuthStore
       getter auth_accounts : Hash(URI, Tuple(String, String))
+
       def initialize
         @auth_accounts = Hash(URI, Tuple(String, String)).new
       end
 
       def add_auth(uri, user, pass)
         unless uri.is_a?(URI)
-          uri = URI.new(uri) 
+          uri = URI.new(uri)
         end
-        #uri += '/'
+        # uri += '/'
         uri.user = nil
         uri.password = nil
 
         auth_accounts[uri] = {user, pass}
-      end  ##
+      end ##
 
       # Retrieves credentials for +realm+ on the server at +uri+.
       def credentials_for(uri, realm) : Tuple(String)
         unless uri.is_a?(URI)
-          uri = URI.new(uri) 
+          uri = URI.new(uri)
         end
-        #uri += '/'
+        # uri += '/'
         uri.user = nil
         uri.password = nil
-        
+
         auth_accounts[uri]
       end
     end