diff --git a/main.ts b/main.ts
index a1b2801..608b110 100644
--- a/main.ts
+++ b/main.ts
@@ -10,6 +10,10 @@ await new Command()
 	.description('Create Redmine users from CSV and add users to a group.')
 	.version('0.1.0')
 	.option('-g, --group <group:string>', 'Name of the group to add users in.')
+	.option(
+		'-o, --only-add [only-add:boolean]',
+		"Don't create users, only add them to a group",
+	)
 	.option('-d, --endpoint <endpoint:string>', 'Redmine server address.', {
 		default: 'https://projets.cohabit.fr/redmine',
 	})
@@ -19,7 +23,7 @@ await new Command()
 		{ required: true },
 	)
 	.arguments('<csv:file>')
-	.action(async ({ group, endpoint, apiKey }, domain) => {
+	.action(async ({ group, endpoint, apiKey, onlyAdd }, domain) => {
 		const redmine = new Redmine({ endpoint, apiKey })
 
 		const file = await Deno.readTextFile(domain)
@@ -28,7 +32,7 @@ await new Command()
 			skipFirstRow: true,
 		}) as CsvEntry[]
 
-		createUsers(redmine, csv)
+		if (!onlyAdd) createUsers(redmine, csv)
 		if (group) {
 			appendToGroup(redmine, csv, prompt('Enter a group name ?: ') ?? '')
 		}