fine-tuning login

capsulflask/schema_migrations/02_up_accounts_vms_etc.sql

@@ -15,7 +15,7 @@ CREATE TABLE vms (
 CREATE TABLE payments (
   email      TEXT REFERENCES accounts(email) ON DELETE RESTRICT,
   created    TIMESTAMP NOT NULL DEFAULT NOW(),
-  dollars    INTEGER NOT NULL,
+  dollars    NUMERIC(8, 2) NOT NULL,
   PRIMARY KEY (email, created)
 );