diff --git a/README.md b/README.md
index 292ac8c..a356596 100644
--- a/README.md
+++ b/README.md
@@ -23,8 +23,10 @@ ramon@email.com:
       alpha: /mnt/c/Users/me/src # local machine
       beta: ~/src # remote machine
 ramon@company.com:
-  project: development-254604
-  box: ramon
+  - project: development-254604
+    box: ramon
+    user: another_user # only needed if ramon_company_com is not the user
+    identity_file: /path/to/ssh-private # ~/.ssh/google_compute_engine by default
 ```
 
 To start and create the mutagen session:
diff --git a/lib/devbox_launcher/models/box.rb b/lib/devbox_launcher/models/box.rb
index fb50f3f..ef55743 100644
--- a/lib/devbox_launcher/models/box.rb
+++ b/lib/devbox_launcher/models/box.rb
@@ -10,7 +10,6 @@ class Box
     ]
     WAIT_BOOT_IN_SECONDS = 10.freeze
     MAX_BOOT_RETRIES = 20
-    DEFAULT_IDENTIFY_FILE_PATH = "~/.ssh/google_compute_engine".freeze
     SSH_CONFIG_PATH = File.expand_path("~/.ssh/config").freeze
     CONFIG_PATH = File.expand_path("~/.devbox_launcher.yml").freeze
     CONFIG = YAML.load_file(CONFIG_PATH).freeze
@@ -104,7 +103,7 @@ def set_ssh_config!
       args = {
         "HostName" => description.ip,
         "User" => username,
-        "IdentityFile" => DEFAULT_IDENTIFY_FILE_PATH,
+        "IdentityFile" => box_config.identity_file,
       }
       args.each do |key, value|
         ssh_config.set(hostname, key, value)
@@ -206,7 +205,7 @@ def hostname
     end
 
     def username
-      @username ||= account.gsub(/\W/, "_")
+      @username ||= box_config.user || account.gsub(/\W/, "_")
     end
 
     def account_config
diff --git a/lib/devbox_launcher/models/box_config.rb b/lib/devbox_launcher/models/box_config.rb
index a9d85ba..4de922e 100644
--- a/lib/devbox_launcher/models/box_config.rb
+++ b/lib/devbox_launcher/models/box_config.rb
@@ -1,6 +1,8 @@
 module DevboxLauncher
   class BoxConfig
 
+    DEFAULT_IDENTIFY_FILE_PATH = "~/.ssh/google_compute_engine".freeze
+
     attr_reader :config
 
     def initialize(config)
@@ -19,5 +21,13 @@ def zone
       config[:zone]
     end
 
+    def user
+      config[:user]
+    end
+
+    def identity_file
+      config[:identity_file] || DEFAULT_IDENTIFY_FILE_PATH
+    end
+
   end
 end