add log out docs (#418)

Author: GokceGK

docs/stackit_auth.md

@@ -31,4 +31,5 @@ stackit auth [flags]
 * [stackit](./stackit.md)	 - Manage STACKIT resources using the command line
 * [stackit auth activate-service-account](./stackit_auth_activate-service-account.md)	 - Authenticates using a service account
 * [stackit auth login](./stackit_auth_login.md)	 - Logs in to the STACKIT CLI
+* [stackit auth logout](./stackit_auth_logout.md)	 - Logs the user account out of the STACKIT CLI
 

docs/stackit_auth_logout.md

@@ -0,0 +1,39 @@
+## stackit auth logout
+
+Logs the user account out of the STACKIT CLI
+
+### Synopsis
+
+Logs the user account out of the STACKIT CLI.
+
+```
+stackit auth logout [flags]
+```
+
+### Examples
+
+```
+  Log out of the STACKIT CLI.
+  $ stackit auth logout
+```
+
+### Options
+
+```
+  -h, --help   Help for "stackit auth logout"
+```
+
+### Options inherited from parent commands
+
+```
+  -y, --assume-yes             If set, skips all confirmation prompts
+      --async                  If set, runs the command asynchronously
+  -o, --output-format string   Output format, one of ["json" "pretty" "none" "yaml"]
+  -p, --project-id string      Project ID
+      --verbosity string       Verbosity of the CLI, one of ["debug" "info" "warning" "error"] (default "info")
+```
+
+### SEE ALSO
+
+* [stackit auth](./stackit_auth.md)	 - Authenticates the STACKIT CLI
+