feat: add simple cli user management

src/db/user.rs

@@ -51,6 +51,22 @@ impl User {
             .verify_password(password.as_ref().as_bytes(), &password_hash)
             .is_ok()
     }
+
+    pub fn all(pool: &DbPool) -> Result<Vec<Self>, DbError> {
+        let conn = pool.get()?;
+
+        let mut stmt = conn.prepare("select * from users")?;
+        let users: Result<Vec<_>, _> = stmt.query_map((), Self::from_row)?.collect();
+
+        Ok(users?)
+    }
+
+    pub fn remove_by_username(pool: &DbPool, username: impl AsRef<str>) -> Result<bool, DbError> {
+        let conn = pool.get()?;
+        let mut stmt = conn.prepare("delete from users where username = $1")?;
+
+        Ok(stmt.execute((username.as_ref(),))? > 0)
+    }
 }
 
 fn hash_password(password: impl AsRef<str>) -> String {