How do I Implement Bearer Tokens with Gin – Getting Assist

Presently, I’m studying easy methods to implement http authentication utilizing bearer
tokens, however I don’t know the place to begin. I’ve appeared guides on-line, however
I really feel like I’m lacking one thing. The best way I at the moment do authentication is utilizing gin for routing and bcrypt to retailer the hashed password in hex inside postgresql the place I confirm the hash towards the password offered by the consumer. Under is the instance guides on-line current. Am I presupposed to actually write out the consumer’s username and password for gin’s primary authentication. Additionally how is that this presupposed to work for a newly created
consumer that already listed? Its simply not clear to me.

On-line Implmenetation

package deal essential

import (
    "crypto/rand"
    "encoding/hex"
    "github.com/gin-gonic/gin"
    "web/http"
    "strings"
)

var tokens []string

func essential() {
    r := gin.Default()
    r.POST("/login", gin.BasicAuth(gin.Accounts{
        "admin": "secret",
    }), func(c *gin.Context) {
        token, _ := randomHex(20)
        tokens = append(tokens, token)

        c.JSON(http.StatusOK, gin.H{
            "token": token,
        })
    })
    r.GET("/useful resource", func(c *gin.Context) {
        bearerToken := c.Request.Header.Get("Authorization")
        reqToken := strings.Break up(bearerToken, " ")[1]
        for _, token := vary tokens {
            if token == reqToken {
                c.JSON(http.StatusOK, gin.H{
                    "knowledge": "useful resource knowledge",
                })
                return
            }
        }
        c.JSON(http.StatusUnauthorized, gin.H{
            "message": "unauthorized",
        })
    })
    r.Run() // Pay attention and serve on 0.0.0.0:8080 (for Home windows "localhost:8080")
}

func randomHex(n int) (string, error) {
    bytes := make([]byte, n)
    if _, err := rand.Learn(bytes); err != nil {
        return "", err
    }
    return hex.EncodeToString(bytes), nil
}

refs: