feat(otter): cli command to toggle admin status

otter/src/cli/gpo.rs

@@ -1,4 +1,4 @@
-use clap::{Args, Subcommand};
+use clap::{ArgAction, Args, Subcommand};
 
 use super::CliError;
 
@@ -22,6 +22,12 @@ pub enum UserCommand {
     Add { username: String, password: String },
     /// Generate a signup link ID
     GenerateSignupLink,
+    /// Give or remove admin privileges to a user
+    SetAdmin {
+        username: String,
+        #[clap(action=ArgAction::Set)]
+        is_admin: bool,
+    },
 }
 
 impl Command {
@@ -67,6 +73,11 @@ impl UserCommand {
 
                 println!("/signup/{}", link.id);
             }
+            Self::SetAdmin { username, is_admin } => {
+                let mut user = store.get_user(username)?;
+                user.admin = *is_admin;
+                store.update_user(user)?;
+            }
         }
 
         Ok(())