FireBase認証をHeroku上にあるアプリケーションから実施する方法について

Djangoにて、Firebaseのログインを実装する際に、
drf-firebase-authを使用しております。
FIREBASE_SERVICE_ACCOUNT_KEYを設定する必要があるため、
HEROKU上の環境変数に、認証情報のJSONファイルを1行にした状態で登録しておりますが、

Heorku上でOSError: [Errno 36] File name too long:のエラーが発生します。

言語：DjangoRestFramework
動作環境：Heroku

下記が該当のログとなります。
2022-06-18T05:00:48.930355+00:00 app[web.1]: Internal Server Error: /api/v1/main/login/
2022-06-18T05:00:48.930387+00:00 app[web.1]: Traceback (most recent call last):
2022-06-18T05:00:48.930388+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/core/handlers/exception.py", line 47, in inner
2022-06-18T05:00:48.930388+00:00 app[web.1]: response = get_response(request)
2022-06-18T05:00:48.930389+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/core/handlers/base.py", line 167, in _get_response
2022-06-18T05:00:48.930449+00:00 app[web.1]: callback, callback_args, callback_kwargs = self.resolve_request(request)
2022-06-18T05:00:48.930449+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/core/handlers/base.py", line 290, in resolve_request
2022-06-18T05:00:48.930450+00:00 app[web.1]: resolver_match = resolver.resolve(request.path_info)
2022-06-18T05:00:48.930451+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/urls/resolvers.py", line 545, in resolve
2022-06-18T05:00:48.930451+00:00 app[web.1]: for pattern in self.url_patterns:
2022-06-18T05:00:48.930451+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/utils/functional.py", line 48, in get
2022-06-18T05:00:48.930452+00:00 app[web.1]: res = instance.dict[self.name] = self.func(instance)
2022-06-18T05:00:48.930452+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/urls/resolvers.py", line 589, in url_patterns
2022-06-18T05:00:48.930452+00:00 app[web.1]: patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
2022-06-18T05:00:48.930452+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/utils/functional.py", line 48, in get
2022-06-18T05:00:48.930453+00:00 app[web.1]: res = instance.dict[self.name] = self.func(instance)
2022-06-18T05:00:48.930453+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/urls/resolvers.py", line 582, in urlconf_module
2022-06-18T05:00:48.930453+00:00 app[web.1]: return import_module(self.urlconf_name)
2022-06-18T05:00:48.930459+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/importlib/init.py", line 127, in import_module
2022-06-18T05:00:48.930460+00:00 app[web.1]: return _bootstrap._gcd_import(name[level:], package, level)
2022-06-18T05:00:48.930460+00:00 app[web.1]: File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
2022-06-18T05:00:48.930460+00:00 app[web.1]: File "<frozen importlib._bootstrap>", line 991, in _find_and_load
2022-06-18T05:00:48.930461+00:00 app[web.1]: File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
2022-06-18T05:00:48.930461+00:00 app[web.1]: File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
2022-06-18T05:00:48.930461+00:00 app[web.1]: File "<frozen importlib._bootstrap_external>", line 783, in exec_module
2022-06-18T05:00:48.930462+00:00 app[web.1]: File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
2022-06-18T05:00:48.930463+00:00 app[web.1]: File "/app/config/urls.py", line 8, in <module>
2022-06-18T05:00:48.930463+00:00 app[web.1]: path('', include('main.urls')),
2022-06-18T05:00:48.930463+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/urls/conf.py", line 34, in include
2022-06-18T05:00:48.930463+00:00 app[web.1]: urlconf_module = import_module(urlconf_module)
2022-06-18T05:00:48.930464+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/importlib/init.py", line 127, in import_module
2022-06-18T05:00:48.930464+00:00 app[web.1]: return _bootstrap._gcd_import(name[level:], package, level)
2022-06-18T05:00:48.930464+00:00 app[web.1]: File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
2022-06-18T05:00:48.930465+00:00 app[web.1]: File "<frozen importlib._bootstrap>", line 991, in _find_and_load
2022-06-18T05:00:48.930465+00:00 app[web.1]: File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
2022-06-18T05:00:48.930465+00:00 app[web.1]: File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
2022-06-18T05:00:48.930465+00:00 app[web.1]: File "<frozen importlib._bootstrap_external>", line 783, in exec_module
2022-06-18T05:00:48.930466+00:00 app[web.1]: File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
2022-06-18T05:00:48.930466+00:00 app[web.1]: File "/app/main/urls.py", line 2, in <module>
2022-06-18T05:00:48.930466+00:00 app[web.1]: from rest_framework import routers
2022-06-18T05:00:48.930467+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/rest_framework/routers.py", line 22, in <module>
2022-06-18T05:00:48.930467+00:00 app[web.1]: from rest_framework import views
2022-06-18T05:00:48.930467+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/rest_framework/views.py", line 17, in <module>
2022-06-18T05:00:48.930468+00:00 app[web.1]: from rest_framework.schemas import DefaultSchema
2022-06-18T05:00:48.930468+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/rest_framework/schemas/init.py", line 33, in <module>
2022-06-18T05:00:48.930468+00:00 app[web.1]: authentication_classes=api_settings.DEFAULT_AUTHENTICATION_CLASSES,
2022-06-18T05:00:48.930469+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/rest_framework/settings.py", line 225, in getattr
2022-06-18T05:00:48.930469+00:00 app[web.1]: val = perform_import(val, attr)
2022-06-18T05:00:48.930469+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/rest_framework/settings.py", line 168, in perform_import
2022-06-18T05:00:48.930470+00:00 app[web.1]: return [import_from_string(item, setting_name) for item in val]
2022-06-18T05:00:48.930470+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/rest_framework/settings.py", line 168, in <listcomp>
2022-06-18T05:00:48.930470+00:00 app[web.1]: return [import_from_string(item, setting_name) for item in val]
2022-06-18T05:00:48.930470+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/rest_framework/settings.py", line 177, in import_from_string
2022-06-18T05:00:48.930472+00:00 app[web.1]: return import_string(val)
2022-06-18T05:00:48.930478+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/utils/module_loading.py", line 17, in import_string
2022-06-18T05:00:48.930479+00:00 app[web.1]: module = import_module(module_path)
2022-06-18T05:00:48.930479+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/importlib/init.py", line 127, in import_module
2022-06-18T05:00:48.930479+00:00 app[web.1]: return _bootstrap._gcd_import(name[level:], package, level)
2022-06-18T05:00:48.930479+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/drf_firebase_auth/authentication.py", line 31, in <module>
2022-06-18T05:00:48.930480+00:00 app[web.1]: firebase_credentials = firebase_admin.credentials.Certificate(
2022-06-18T05:00:48.930480+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/firebase_admin/credentials.py", line 82, in init
2022-06-18T05:00:48.930480+00:00 app[web.1]: with open(cert) as json_file:
2022-06-18T05:00:48.930485+00:00 app[web.1]: OSError: [Errno 36] File name too long:　～～以下は認証情報～