i have created django models to save the api keys

this is the models code

class Coinbaseapi(models.Model):
    symbol = models.CharField(max_length=10, null=True, blank=True)
    API = models.CharField(max_length=100, null=True, blank=True)
    SECRET = models.CharField(max_length=250, null=True, blank=True)

and using this serializer

class Coinbaseserializer(serializers.ModelSerializer):

    class Meta:
        model = Coinbaseapi
        fields = "__all__"

I tried getting the market data in a function with this code

coinbase = Coinbaseapi.objects.all().first()
        cbSerializer = Coinbaseserializer(coinbase)
        CoinbaseData = cbSerializer.data

current_price = coinbase.fetch_ticker(CoinbaseData['symbol'])['last']

it gives this error

print(coinbase.fetch_ticker(CoinbaseData['symbol'])['last'])
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

n = string[0] if isinstance(string[0], int) else ord(string[0])
                                ~~~~~~^^^
IndexError: index out of range

while i used it buy using local variable and tested in another 1 simple python file and it was working fine.

coinbase = ccxt.coinbase({
    'apiKey': API,
    'secret': SECRET,
     "enableRateLimit": True,
     'options': {
        'defaultType': 'future',  
    }
})
cp = coinbase.fetch_ticker('MATIC/USDT')['last']
print(cp)

I checked on the internet to save it in this format given below

-----BEGIN EC PRIVATE KEY-----
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

-----END EC PRIVATE KEY-----

instead of using this default format below but didn’t worked either

-----BEGIN EC PRIVATE KEY-----nxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxnxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxnxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxn-----END EC PRIVATE KEY-----n