diff --git a/.github/workflows/pytest.yml b/.github/workflows/pytest.yml
new file mode 100644
index 0000000..95138d3
--- /dev/null
+++ b/.github/workflows/pytest.yml
@@ -0,0 +1,31 @@
+name: Run Pytest
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    strategy:
+        matrix:
+            os: ["ubuntu-latest", "windows-latest", "macOS-latest"]
+            python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
+    runs-on: ${{ matrix.os }}
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: ${{ matrix.python-version }}
+
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install -r requirements.txt
+
+    - name: Run tests
+      env:
+        EIA_TOKEN: ${{ secrets.EIA_TOKEN }}
+      run: |
+        pytest tests/test_api.py
\ No newline at end of file
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000..3b152be
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,28 @@
+# Contributing to myeia
+We love your input! We want to make contributing to this project as easy and transparent as possible, whether it's:
+
+- Reporting a bug
+- Discussing the current state of the code
+- Submitting a fix
+- Proposing new features
+
+## Report bugs using Github's [issues](https://github.com/philsv/myeia/issues/)
+We use GitHub issues to track public bugs. Report a bug by [opening a new issue](https://github.com/philsv/myeia/issues/new); it's that easy!
+
+Write bug reports with detail, background, and sample code if possible. **Great Bug Reports** tend to have:
+
+- A quick summary and/or background
+- Steps to reproduce
+  - Be specific!
+  - Give sample code if you can.
+- What you expected would happen
+- What actually happens
+- Notes (possibly including why you think this might be happening, or stuff you tried that didn't work)
+
+## Github Actions
+We use Github Actions to automate the testing and deployment of the package. The workflow is defined in the `.github/workflows` directory.
+To get your code merged into the main branch, you need to pass the tests. Feel free to extend the tests to cover your code.
+For a successful test run it's necessary to [set the EIA_TOKEN as secret](https://docs.github.com/en/actions/security-for-github-actions/security-guides/using-secrets-in-github-actions#creating-secrets-for-a-repository) in your Fork.
+
+## License
+By contributing, you agree that your contributions will be licensed under its [MIT License](LICENSE).
\ No newline at end of file
diff --git a/README.md b/README.md
index 3f2622e..19781c6 100644
--- a/README.md
+++ b/README.md
@@ -227,3 +227,8 @@ Date
 2021-01-25                                              2.602
 ...                                                       ...
 ```
+
+## Contributing
+We love your input! We want to make contributing to this project as easy and transparent as possible.
+Read our [CONTRIBUTING.md](CONTRIBUTING.md) to get started.
+
diff --git a/myeia/api.py b/myeia/api.py
index a54348b..de59a59 100644
--- a/myeia/api.py
+++ b/myeia/api.py
@@ -15,8 +15,7 @@
     level=logging.INFO, format="%(asctime)s - %(message)s", datefmt="%d-%b-%y %H:%M:%S"
 )
 
-load_dotenv()
-
+load_dotenv(verbose=True)
 
 class API:
     """
@@ -30,7 +29,13 @@ def __init__(
         self,
         token: Optional[str] = None,
     ):
-        self.token = token if token else os.getenv("EIA_TOKEN")
+        if token:
+            self.token = token
+        elif os.getenv("EIA_TOKEN"):
+            self.token = os.getenv("EIA_TOKEN")
+        else:
+             raise ValueError('EIA_TOKEN is not set. Please set it in your .env file or environment variables.')
+
         self.base_url = "https://api.eia.gov/v2/"
         self.header = {"Accept": "*/*"}
 
diff --git a/requirements.txt b/requirements.txt
index dafca39..1d57422 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,4 +3,5 @@ pandas>=1.5.3
 pytest>=7.2.1
 python-dateutil>=2.9.0
 python-dotenv>=0.19.0
-requests>=2.32.0
\ No newline at end of file
+requests>=2.32.0
+numpy>=1.21.4
\ No newline at end of file