add: pin and address handlers

queries/admin.sql

@@ -1,2 +1,18 @@
 -- name: get-password-hash
-SELECT password_hash from staff WHERE username = $1;
+SELECT password_hash FROM staff WHERE username = $1;
+
+-- name: pin-status
+SELECT phone_number, failed_pin_attempts,
+CASE STATUS
+	WHEN 1 THEN 'PENDING'
+    WHEN 2 THEN 'ACTIVE'
+    WHEN 3 THEN 'LOCKED'
+    WHEN 4 THEN 'RESET' END AS account_status
+FROM cic_ussd.account WHERE
+failed_pin_attempts > 0 OR STATUS = 4;
+
+--name: phone-2-address
+SELECT blockchain_address FROM users WHERE phone_number = $1;
+
+--name: address-2-phone
+SELECT phone_number FROM users WHERE blockchain_address = $1;