[Python] Is there a Premium Account necesary for the Spotify API?

I am trying to make a Spotify voice control for volume and I can't seem to figure it out. Any ideas? I have been stuck at this for a while and it says Player command failed: Premium required, reason: PREMIUM_REQUIRED. Any help would be appreciated

import spotipy
from spotipy.oauth2 import SpotifyOAuth
import speech_recognition as sr
import pyttsx3

auth_manager = SpotifyOAuth(
client_id="myclientid",
client_secret="myclientsecret",
redirect_uri="http://localhost:8888/callback",
username="username",
scope="user-modify-playback-state"
)
spotipy = spotipy.Spotify(auth_manager=auth_manager)

engine = pyttsx3.init()

def takeCommand():
r = sr.Recognizer()
with sr.Microphone() as source:
print('Listening...')
r.pause_threshold = 0.5
r.energy_threshold = 494
r.adjust_for_ambient_noise(source, duration=0.3)
audio = r.listen(source)

try:
print('Recognizing..')
query = r.recognize_google(audio, language='en-us')
print(f'User said: {query}\n')

except Exception as e:
# print(e)

print('Say that again please...')
return 'None'
return query

def LowerVolume():
spotipy.volume(15)

while True:
query = takeCommand().lower()
if "lower volume" in query:
LowerVolume()

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