Prefer argon2 for password hashing

requirements.txt

-Django[bcrypt]==1.10
+Django[bcrypt, argon2]==1.10
 django-localflavor==1.3
 Pillow
 django-compressor==2.1

website/thaliawebsite/settings/settings.py

@@ -126,6 +126,14 @@ AUTH_PASSWORD_VALIDATORS = [
     },
 ]
 
+PASSWORD_HASHERS = [
+    'django.contrib.auth.hashers.Argon2PasswordHasher',
+    'django.contrib.auth.hashers.PBKDF2PasswordHasher',
+    'django.contrib.auth.hashers.PBKDF2SHA1PasswordHasher',
+    'django.contrib.auth.hashers.BCryptSHA256PasswordHasher',
+    'django.contrib.auth.hashers.BCryptPasswordHasher',
+]
+
 AUTHENTICATION_BACKENDS = [
     'django.contrib.auth.backends.ModelBackend',
     'committees.backends.CommitteeBackend',