ERROR:flask_oidc:Expecting value: line 1 column 1 (char 0)

[SoumyaBadola]

Getting this error in implementing flask OIDC.
Using below code.
import json
import logging
from flask import Flask, g
from flask_oidc import OpenIDConnect
logging.basicConfig(level=logging.DEBUG)
app = Flask(name)
app.config.update({
'SECRET_KEY': 'SomethingNotEntirelySecret',
#'SSL_CONTENT':False,
'TESTING': True,
'DEBUG': True,
"VERIFY_SSL_SERVER": False,
'OIDC_CLIENT_SECRETS': 'client_secrets.json',
'OIDC_ID_TOKEN_COOKIE_SECURE': False,
'OIDC_REQUIRE_VERIFIED_EMAIL': False,
'OIDC_RESOURCE_SERVER_ONLY' : True,
#'OIDC_INTROSPECTION_AUTH_METHOD': 'bearer',
'OIDC_INTROSPECTION_AUTH_METHOD': 'client_secret_post',
'OIDC-SCOPES':['openid'],
'OIDC_TOKEN_TYPE_HINT': 'access_token'

})

oidc = OpenIDConnect(app)

@app.route('/')
def hello_world():
return 'Welcome anonymous'

@app.route('/api')
@oidc.accept_token(require_token=True)
def hello_api():
return 'welcome'
if name == 'main':
app.run()

JSON file-
{
"web": {
"auth_uri": "https:///authorization.oauth2",
"client_id": "T/",
"client_secret": "/",
"redirect_uris": [
""
],
"userinfo_uri": "https://.openid",
"token_uri": "https://.s/token.oauth2",
"token_introspection_uri": "https://./token.oauth2/introspect.oauth2"
}
}