Comenzado el flujo oauth

hay que separar un poco todo

src/services/auth_service.js

@@ -0,0 +1,45 @@
+import axios from "axios";
+
+const current_host = `${window.location.protocol}//${window.location.host}`
+const oauth_url = `${process.env.REACT_APP_API_SERVER}/oauth`;
+const client_id = process.env["REACT_APP_CLIENT_ID"];
+
+const generate_challenge = () => {
+    return {
+        code: '5d2309e5bb73b864f989753887fe52f79ce5270395e25862da6940d5',
+        challenge: 'MChCW5vD-3h03HMGFZYskOSTir7II_MMTb8a9rJNhnI',
+        method: 'S256',
+    }
+}
+
+export const obtain_code = () => {
+    const challenge = generate_challenge()
+    const params = {
+        response_type: 'code',
+        client_id: client_id,
+        redirect_uri: `${current_host}/login`,
+        scope: 'read write',
+        code_challenge: challenge.challenge,
+        code_challenge_method: challenge.method
+    };
+    const url = `${oauth_url}/authorize/?${new URLSearchParams(params).toString()}`;
+
+    return {
+        redirect: url,
+        code_verifier: challenge.code
+    }
+}
+
+export const get_auth = async (code, code_verifier) => {
+    const params = {
+        code: code,
+        code_verifier: code_verifier,
+        grant_type: 'authorization_code',
+        redirect_uri: `${current_host}/login`,
+        client_id: client_id,
+    };
+    const url = `${oauth_url}/token/`
+    const response = await axios.post(url, new URLSearchParams(params));
+
+    return response.data
+}