class MyBasicAuth(BasicAuth):
    def check_auth(self,username,password,allowed_roles,resource,method):
        return username == 'secretusername' and password == 'secretpass'

from flask import request, abort, current_app
from werkzeug.http import parse_authorization_header

def check_blueprint_auth():
    if 'Authorization' not in request.headers:
        print('Authorization header not found for authentication')
        return abort(401, 'Authorization header not found for authentication')
    header = parse_authorization_header(request.headers['Authorization'])
    username = None if header is None else header['username']
    password = None if header is None else header['password']

    return username == 'secretusername' and password == 'secretpass'

from flask import Blueprint, current_app as app
# your auth function
from auth import check_blueprint_auth

blueprint = Blueprint('prefix_uri', __name__)

# this sets the auth function to be called
blueprint.before_request(check_blueprint_auth)


@blueprint.route('/custom_route/<some_value>', methods=['POST'])
def post_something(some_value):
#  something

from eve import Eve
# your blueprint
from users import blueprint
from flask import current_app, request

app = Eve()
# register the blueprint to the main Eve application
app.register_blueprint(blueprint)

app.run()