Create SQL Instruction

backend/src/README.md

@@ -0,0 +1,22 @@
+# Replacing Passwords:
+
+Run this code in NodeJS:
+```js
+const { scrypt, randomBytes } = require("crypto");
+
+function hash(password) {
+    const salt = randomBytes(16).toString("hex");
+    const buf = new Promise((res, rej) =>
+        scrypt(password, salt, 64, (err, buf) => (err ? rej(err) : console.log(
+            `${buf.toString("hex")}.${salt}`
+            ))))
+}
+
+hash("PASSWORD");
+```
+Now we can put it in the table.  
+Look for the UID using `SELECT * FROM users;`  
+Update using `UPDATE users SET password='HASH' WHERE uid='uid';`  
+Delete using `DELETE FROM users WHERE uid='uid';`  
+Add using `INSERT INTO users values ('uid', 'username'...);`
+