diff --git a/cron.php b/cron.php
index 384ce0f..d0eb444 100644
--- a/cron.php
+++ b/cron.php
@@ -25,7 +25,7 @@ foreach ($mx_db->query($sql) as $row) {
 						$homeserver,
 						$row["first_name"] . " " . $row["last_name"],
 						$row["email"],
-						$row["verify_url"]);
+						$verify_url);
 
 				if ($success) {
 					$mx_db->setRegistrationStateById(RegisterState::PendingEmailVerify, $row["id"]);
@@ -58,7 +58,7 @@ foreach ($mx_db->query($sql) as $row) {
 			case RegisterState::PendingRegistration:
 				// Registration got accepted but registration failed
 
-				$password = addUser($row["first_name"], $row["last_name"], $row["username"], $row["email"]);
+				$password = $mx_db->addUser($row["first_name"], $row["last_name"], $row["username"], $row["email"]);
 				if ($password != NULL) {
 					// send registration_success
 					$res = send_mail_registration_success($homeserver, $first_name . " " . $last_name, $email, $username, $password, $howToURL);
diff --git a/database.php b/database.php
index 3181328..c568b2a 100644
--- a/database.php
+++ b/database.php
@@ -116,7 +116,7 @@ class mxDatabase
 	function userPendingRegistrations($username) {
 		$sql = "SELECT COUNT(*) FROM registrations WHERE username = '" . $username . "' AND NOT state = "
 		       . RegisterState::RegistrationDeclined . " LIMIT 1;";
-		$res = $db->query($sql);
+		$res = $this->db->query($sql);
 		if ($res->fetchColumn() > 0) {
 			return true;
 		}
@@ -143,7 +143,7 @@ class mxDatabase
 	 * @return ["verify_token"]
 	 */
 	function addRegistration($first_name, $last_name, $username, $note, $email) {
-		if ($this->userPendingRegistrations()) {
+		if ($this->userPendingRegistrations($username)) {
 			require_once "language.php";
 			throw new Exception($language["USERNAME_PENDING_REGISTRATION"]);
 		}
@@ -155,7 +155,7 @@ class mxDatabase
 		$verify_token = bin2hex(random_bytes(16));
 		$admin_token = bin2hex(random_bytes(16));
 
-		$db->exec('INSERT INTO registrations
+		$this->db->exec('INSERT INTO registrations
 			(first_name, last_name, username, note, email, verify_token, admin_token)
 			VALUES ("' . $first_name.'","' . $last_name . '","' . $username . '","'	. $note . '","'
 			. $email.'","'	.$verify_token.'","'	.$admin_token.'")');
@@ -174,7 +174,7 @@ class mxDatabase
 	function getUserForApproval($admin_token) {
 		$sql = "SELECT COUNT(*) FROM registrations WHERE admin_token = '" . $admin_token . "'"
 			. " AND state = " . RegisterState::PendingAdminVerify . " LIMIT 1;";
-		$res = $db->query($sql);
+		$res = $this->db->query($sql);
 		$first_name = NULL; $last_name = NULL; $username = NULL; $note = NULL; $email = NULL;
 
 		if ($res->fetchColumn() > 0) {
@@ -199,14 +199,14 @@ class mxDatabase
 	function getUserForVerify($verify_token) {
 		$sql = "SELECT COUNT(*) FROM registrations WHERE verify_token = '" . $verify_token . "'"
 			. " AND state = " . RegisterState::PendingEmailVerify . " LIMIT 1;";
-		$res = $db->query($sql);
+		$res = $this->db->query($sql);
 		$first_name = NULL; $last_name = NULL; $username = NULL; $note = NULL; $email = NULL;
 
 		if ($res->fetchColumn() > 0) {
 			$sql = "SELECT first_name, last_name, note, email, admin_token FROM registrations "
-				. " WHERE verify_token = '" . $token . "'"
+				. " WHERE verify_token = '" . $verify_token . "'"
 				. " AND state = " . RegisterState::PendingEmailVerify . " LIMIT 1;";
-			foreach ($db->query($sql) as $row) {
+			foreach ($this->db->query($sql) as $row) {
 				// will only be executed once
 				return $row;
 			}
@@ -249,7 +249,7 @@ class mxDatabase
 	function addUser($first_name, $last_name, $username, $email) {
 		// generate a password with 10 characters
 		$password = bin2hex(openssl_random_pseudo_bytes(5));
-		$password_hash = password_hash($passwort, PASSWORD_BCRYPT, ["cost"=>12]);
+		$password_hash = password_hash($password, PASSWORD_BCRYPT, ["cost"=>12]);
 
 		$sql = "INSERT INTO logins (firstname, lastname, localpart, password_hash, email) VALUES "
 			. '("' . $first_name.'","' . $last_name . '","' . $username . '","'
diff --git a/public/verify_admin.php b/public/verify_admin.php
index c62fa6d..d8ac122 100644
--- a/public/verify_admin.php
+++ b/public/verify_admin.php
@@ -59,7 +59,7 @@ try {
 		$mxConn = new MatrixConnection($homeserver, $access_token);
 
 		// generate a password with 8 characters
-		$password = addUser($first_name, $last_name, $username, $email);
+		$password = $mx_db->addUser($first_name, $last_name, $username, $email);
 		if ($password != NULL) {
 			// send registration_success
 			$res = send_mail_registration_success($homeserver, $first_name . " " . $last_name, $email, $username, $password, $howToURL);