implement hashing password where needed

auth.py

@@ -7,14 +7,14 @@ PWDB_PATH = 'pwdb.json'
 
 def get_credentials():
     username = input('Enter your username: ')
-    password = getpass('Enter your password: ')
+    hashed_password = pwhash(getpass('Enter your password: '))
-    return (username, password)
+    return (username, hashed_password)
 
-def authenticate(username, password, pwdb):
+def authenticate(username, hashed_password, pwdb):
-    return password == pwdb[username]
+    return hashed_password == pwdb[username]
 
 def add_user(username, pwdb):
-    pwdb[username] = input(f'Enter password for {username}: ')
+    pwdb[username] = pwhash(input(f'Enter password for {username}: '))
     return pwdb
 
 def read_pwdb(PWDB_PATH):
@@ -31,7 +31,12 @@ def write_pwdb(pwdb, PWDB_PATH):
 
 
 def pwhash(pwd):
-    return sha256(pwd)
+    encoded_pwd = pwd.encode("utf-8")
+    m = sha256()
+    m.update(encoded_pwd)
+    return m.hexdigest()
+
+    
 
 if __name__ == "__main__":
     PWDB_PATH = 'pwdb.json'